In Our Time

Melvyn Bragg and guests discuss St Augustine of Hippo's account of his conversion to Christianity and his life up to that point. Written c397AD, it has many elements of autobiography with his scrutiny of his earlier life, his long relationship with a concubine, his theft of pears as a child, his work as an orator and his embrace of other philosophies and Manichaeism. Significantly for the development of Christianity, he explores the idea of original sin in the context of his own experience. The work is often seen as an argument for his Roman Catholicism, a less powerful force where he was living in North Africa where another form of Christianity was dominant, Donatism. While Augustine retells many episodes from his own life, the greater strength of his Confessions has come to be seen as his examination of his own emotional development, and the growth of his soul.WithKate Cooper Professor of History at the University of London and Head of History at Royal HollowayMorwenna Ludlow Professor of Christian History and Theology at the University of Exeterand Martin Palmer Visiting Professor in Religion, History and Nature at the University of WinchesterProducer: Simon Tillotson.

Melvyn Bragg and guests discuss how and why Highlanders and Islanders were cleared from their homes in waves in C18th and C19th, following the break up of the Clans after the Battle of Culloden. Initially, landlords tried to keep people on their estates for money-making schemes, but the end of the Napoleonic Wars brought convulsive changes. Some of the evictions were notorious, with the sudden and fatal burning of townships, to make way for sheep and deer farming. For many, migration brought a new start elsewhere in Britain or in the British colonies, while for some it meant death from disease while in transit. After more than a century of upheaval, the Clearances left an indelible mark on the people and landscape of the Highlands and Western Isles.The image above is a detail from a print of 'Lochaber No More' by John Watson Nicol 1856-1926With Sir Tom Devine Professor Emeritus of Scottish History at the University of EdinburghMarjory Harper Professor of History at the University of Aberdeen and Visiting Professor at the University of the Highlands and IslandsAndMurray Pittock Bradley Professor of English Literature and Pro Vice Principal at the University of GlasgowProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the ideas attributed to Sun Tzu (544-496BC, according to tradition), a legendary figure from the beginning of the Iron Age in China, around the time of Confucius. He may have been the historical figure Sun Wu, a military adviser at the court of King Helu of Wu (who reigned between about 514 and 496 BC), one of the kings in power in the Warring States period of Chinese history (6th - 5th century BC). Sun Tzu was credited as the author of The Art of War, a work on military strategy that soon became influential in China and then Japan both for its guidance on conducting and avoiding war and for its approach to strategy generally. After The Art of War was translated into European languages in C18th, its influence spread to military academies around the world.The image above is of a terracotta warrior from the tomb of Qin Shi Huang, the first Emperor, who unified China after the Warring States period.With Hilde De Weerdt Professor of Chinese History at Leiden UniversityTim Barrett Professor Emeritus of East Asian History at SOAS, University of LondonAndImre Galambos Reader in Chinese Studies at the University of CambridgeProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the pioneering scientist Rosalind Franklin (1920 - 1958). During her distinguished career, Franklin carried out ground-breaking research into coal and viruses but she is perhaps best remembered for her investigations in the field of DNA. In 1952 her research generated a famous image that became known as Photograph 51. When the Cambridge scientists Francis Crick and James Watson saw this image, it enabled them the following year to work out that DNA has a double-helix structure, one of the most important discoveries of modern science. Watson, Crick and Franklin's colleague Maurice Wilkins received a Nobel Prize in 1962 for this achievement but Franklin did not and today many people believe that Franklin has not received enough recognition for her work. With:Patricia Fara President of the British Society for the History of ScienceJim Naismith Interim lead of the Rosalind Franklin Institute, Director of the Research Complex at Harwell and Professor at the University of OxfordJudith Howard Professor of Chemistry at Durham UniversityProducer: Victoria Brignell.

Melvyn Bragg and guests discuss fungi. These organisms are not plants or animals but a kingdom of their own. Millions of species of fungi live on the Earth and they play a crucial role in ecosystems, enabling plants to obtain nutrients and causing material to decay. Without fungi, life as we know it simply would not exist. They are also a significant part of our daily life, making possible the production of bread, wine and certain antibiotics. Although fungi brought about the colonisation of the planet by plants about 450 million years ago, some species can kill humans and devastate trees. With:Lynne Boddy Professor of Fungal Ecology at Cardiff UniversitySarah Gurr Professor of Food Security in the Biosciences Department at the University of ExeterDavid Johnson N8 Chair in Microbial Ecology at the University of ManchesterProducer: Victoria Brignell.

In a programme first broadcast in 2018, Melvyn Bragg and guests discuss the life and ideas of Frederick Douglass, who was born into slavery in Maryland in 1818 and, once he had escaped, became one of that century's most prominent abolitionists. He was such a good orator, his opponents doubted his story, but he told it in grim detail in 1845 in his book 'Narrative of the Life of Frederick Douglass, an American Slave.' He went on to address huge audiences in Great Britain and Ireland and there some of his supporters paid off his owner, so Douglass could be free in law and not fear recapture. After the Civil War and the abolition of slavery, he campaigned for equal rights for African-Americans, arguing against those such as Lincoln who had wanted freed slaves to leave America and found a colony elsewhere. "We were born here," he said, "and here we will remain."WithCeleste-Marie Bernier Professor of Black Studies in the English Department at the University of EdinburghKaren Salt Assistant Professor in Transnational American Studies at the University of NottinghamAndNicholas Guyatt Reader in North American History at the University of CambridgeProducer: Simon Tillotson.

The octopus, the squid, the nautilus and the cuttlefish are some of the most extraordinary creatures on this planet, intelligent and yet apparently unlike other life forms. They are cephalopods and are part of the mollusc family like snails and clams, and they have some characteristics in common with those. What sets them apart is the way members of their group can change colour, camouflage themselves, recognise people, solve problems, squirt ink, power themselves with jet propulsion and survive both on land, briefly, and in the deepest, coldest oceans. And, without bones or shells, they grow so rapidly they can outstrip their rivals when habitats change, making them the great survivors and adaptors of the animal world.WithLouise Allcock Lecturer in Zoology at the National University of Ireland, GalwayPaul Rodhouse Emeritus Fellow of the British Antarctic SurveyandJonathan Ablett Senior Curator of Molluscs at the Natural History MuseumProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the ideas developed by Marcus Tullius Cicero (106-43BC) to support and reinvigorate the Roman Republic when, as it transpired, it was in its final years, threatened by civil wars, the rule of Julius Caesar and the triumvirates that followed. As Consul he had suppressed a revolt by Catiline, putting the conspirators to death summarily as he believed the Republic was in danger and that this danger trumped the right to a fair trial, a decision that rebounded on him. While in exile he began works on duty, laws, the orator and the republic. Although left out of the conspiracy to kill Caesar, he later defended that murder in the interests of the Republic, only to be murdered himself soon after.With Melissa Lane The Class of 1943 Professor of Politics at Princeton University and 2018 Carlyle Lecturer at the University of OxfordCatherine Steel Professor of Classics at the University of GlasgowAndValentina Arena Reader in Roman History at University College LondonProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the work, ideas and life of the Russian poet whose work was celebrated in C20th both for its quality and for what it represented, written under censorship in the Stalin years. Her best known poem, Requiem, was written after her son was imprisoned partly as a threat to her and, to avoid punishment for creating it, she passed it on to her supporters to be memorised, line by line, rather than written down. She was a problem for the authorities and became significant internationally, as her work came to symbolise resistance to political tyranny and the preservation of pre-Revolutionary liberal values in the Soviet era.The image above is based on 'Portrait of Anna Akhmatova' by N.I. Altman, 1914, MoscowWithKatharine Hodgson Professor in Russian at the University of ExeterAlexandra Harrington Reader in Russian Studies at Durham UniversityAndMichael Basker Professor of Russian Literature and Dean of Arts at the University of BristolProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the event of which Voltaire, two hundred years later, said 'nothing was more well known'. In 1565, Suleiman the Magnificent, the Ottoman leader, sent a great fleet west to lay siege to Malta and capture it for his empire. Victory would mean control of trade across the Mediterranean and a base for attacks on Spain, Sicily and southern Italy, even Rome. It would also mean elimination of Malta's defenders, the Knights Hospitaller, driven by the Ottomans from their base in Rhodes in 1522 and whose raids on his shipping had long been a thorn in his side. News of the Great Siege of Malta spread fear throughout Europe, though that turned to elation when, after four months of horrific fighting, the Ottomans withdrew, undermined by infighting between their leaders and the death of the highly-valued admiral, Dragut. The Knights Hospitaller had shown that Suleiman's forces could be contained, and their own order was reinvigorated. The image above is the Death of Dragut at the Siege of Malta (1867), after a painting by Giuseppe Cali. Dragut (1485 – 1565) was an Ottoman Admiral and privateer, known as The Drawn Sword of Islam and as one of the finest generals of the time.With Helen Nicholson Professor of Medieval History at Cardiff UniversityDiarmaid MacCulloch Professor of the History of the Church at the University of OxfordandKate Fleet Director of the Skilliter Centre for Ottoman Studies and Fellow of Newnham College, CambridgeProducer: Simon Tillotson.

Melvyn Bragg and guests discuss Shakespeare's best known, most quoted and longest play, written c1599 - 1602 and rewritten throughout his lifetime. It is the story of Hamlet, Prince of Denmark, encouraged by his father's ghost to take revenge on his uncle who murdered him, and is set at the court of Elsinore. In soliloquies, the Prince reveals his inner self to the audience while concealing his thoughts from all at the Danish court, who presume him insane. Shakespeare gives him lines such as 'to be or not to be,' 'alas, poor Yorick,' and 'frailty thy name is woman', which are known even to those who have never seen or read the play. And Hamlet has become the defining role for actors, men and women, who want to show their mastery of Shakespeare's work. The image above is from the 1964 film adaptation, directed by Grigori Kozintsev, with Innokenty Smoktunovsky as Hamlet.WithSir Jonathan Bate Provost of Worcester College, University of OxfordCarol Rutter Professor of Shakespeare and Performance Studies at the University of WarwickAndSonia Massai Professor of Shakespeare Studies at King's College LondonProducer: Simon Tillotson.

Melvyn Bragg and guests discuss one of the great composers, who was born into a family of musicians in Bonn. His grandfather was an eminent musician and also called Ludwig van Beethoven. His father, who was not as talented as Beethoven's grandfather, drank heavily and died when Beethoven was still young. It was his move to Vienna that allowed him to flourish, with the support at first of aristocratic patrons, when that city was the hub of European music. He is credited with developing the symphony further than any who preceded him, with elevating instrumental above choral music and with transforming music to the highest form of art. He composed his celebrated works while, from his late twenties onwards, becoming increasingly deaf.(Before the live broadcast, BBC Radio 3's Breakfast programme played selections from Beethoven, with Essential Classics playing more, immediately after, on the same network.)With Laura Tunbridge Professor of Music and Henfrey Fellow, St Catherine's College, University of OxfordJohn Deathridge Emeritus King Edward Professor of Music at King's College LondonAndErica Buurman Senior Lecturer in Music, Canterbury Christchurch UniversityProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the man who was Henry II's Chancellor and then Archbishop of Canterbury and who was murdered by knights in Canterbury Cathedral (depicted by Matthew Paris, above). Henry believed that Becket owed him loyalty as he had raised him to the highest offices, and that he should agree to Henry's courts having jurisdiction over 'criminous clerics'. They fell out when Becket agreed to this jurisdiction verbally but would not put his seal on the agreement, the Constitutions of Clarendon. The rift deepened when Henry's heir was crowned without Becket, who excommunicated the bishops who took part. Becket's tomb became one of the main destinations for pilgrims for the next 400 years, including those in Chaucer's Canterbury Tales where he was the 'blisful martir'. With Laura Ashe Associate Professor of English at Worcester College, University of OxfordMichael Staunton Associate Professor in History at University College DublinAndDanica Summerlin Lecturer in Medieval History at the University of SheffieldProducer: Simon Tillotson.

Melvyn Bragg and guests discuss Herman Melville's (1819-1891) epic novel, published in London in 1851, the story of Captain Ahab's pursuit of a great white sperm whale that had bitten off his leg. He risks his own life and that of his crew on the Pequod, single-mindedly seeking his revenge, his story narrated by Ishmael who was taking part in a whaling expedition for the first time. This is one of the c1000 ideas which listeners sent in this autumn for our fourth Listener Week, following Kafka's The Trial in 2014, Captain Cook in 2015 and Garibaldi and the Risorgimento in 2016.With Bridget Bennett Professor of American Literature and Culture at the University of LeedsKatie McGettigan Lecturer in American Literature at Royal Holloway, University of LondonAndGraham Thompson Associate Professor of American Studies at the University of NottinghamProducer: Simon Tillotson.

In a programme first broadcast in 2017, Melvyn Bragg and guests discuss Gauss (1777-1855), widely viewed as one of the greatest mathematicians of all time. He was a child prodigy, correcting his father's accounts before he was 3, dumbfounding his teachers with the speed of his mental arithmetic, and gaining a wealthy patron who supported his education. He wrote on number theory when he was 21, with his Disquisitiones Arithmeticae, which has influenced developments since. Among his achievements, he was the first to work out how to make a 17-sided polygon, he predicted the orbit of the minor planet Ceres, rediscovering it, he found a way of sending signals along a wire, using electromagnetism, the first electromagnetic telegraph, and he advanced the understanding of parallel lines on curved surfaces. With Marcus du Sautoy Professor of Mathematics and Simonyi Professor for the Public Understanding of Science at the University of OxfordColva Roney-Dougal Reader in Pure Mathematics at the University of St AndrewsAnd Nick Evans Professor of Theoretical Physics at the University of SouthamptonProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the myths and history of the ancient Greek city of Thebes and its depiction in Athenian drama. In myths it was said to be home to Heracles, Dionysus, Oedipus and Cadmus among others and, in history, was infamous for supporting Xerxes in the Persian War. Its prominence led to a struggle with the rising force of Macedon in which the Thebans were defeated at Chaironea in 338 BC, one of the most important battles in ancient history. The position of Thebes in Greek culture was enormously powerful. The strength of its myths and its proximity to Athens made it a source of stories for the Athenian theatre, and is the setting for more of the surviving plays than any other location. The image, above, is of Oedipus answering questions of the sphinx in Thebes (cup 5th century BC).With Edith Hall Professor of Classics at King's College LondonSamuel Gartland Lecturer in Ancient History at Corpus Christi College, University of OxfordandPaul Cartledge Emeritus Professor of Greek Culture and AG Leventis Senior Research Fellow at Clare College, University of CambridgeProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the life and impact of Germaine de Staël (1766-1817) who Byron praised as Europe's greatest living writer, and was at the heart of intellectual and literary life in the France of revolution and of Napoleon. As well as attracting and inspiring others in her salon, she wrote novels, plays. literary criticism, political essays, and poems and developed the ideas behind Romanticism. She achieved this while regularly exiled from the Paris in which she was born, having fallen out with Napoleon who she opposed, becoming a towering figure in the history of European ideas.With Catriona Seth, Marshal Foch Professor of French Literature at the University of OxfordAlison Finch, Professor Emerita of French Literature at the University of Cambridgeand Katherine Astbury, Associate Professor and Reader in French Studies at the University of Warwick.Producer: Simon Tillotson.

Melvyn Bragg and guests discuss The Picts and, to mark our twentieth season, that discussion takes place in front of a student audience at the University of Glasgow, many of them studying this topic. According to Bede writing c731AD, the Picts, with the English, Britons, Scots and Latins, formed one of the five nations of Britain, 'an island in the ocean formerly called Albion'. The Picts is now a label given to the people who lived in Scotland north of the Forth-Clyde line from about 300 AD to 900 AD, from the time of the Romans to the time of the Vikings. They left intricately carved stones, such as the one above with a bull motif, from Burghead, Moray, Scotland, but there are relatively few other traces. Who were they, and what happened to them? And what has been learned in the last twenty years, through archaeology? With Katherine Forsyth Reader in the Department of Celtic and Gaelic at the University of GlasgowAlex Woolf Senior Lecturer in Dark Age Studies at the University of St Andrewsand Gordon Noble Reader in Archaeology at the University of AberdeenProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the context and impact of Pablo Picasso's iconic work, created soon after the bombing on 26th April 1937 that obliterated much of the Basque town of Guernica, and its people. The attack was carried out by warplanes of the German Condor Legion, joined by the Italian air force, on behalf of Franco's Nationalists. At first the Nationalists denied responsibility, blaming their opponents for creating the destruction themselves for propaganda purposes, but the accounts of journalists such as George Steer, and the prominence of Picasso's work, kept the events of that day under close scrutiny. Picasso's painting has gone on to become a symbol warning against the devastation of war.With Mary Vincent Professor of Modern European History at the University of SheffieldGijs van Hensbergen Historian of Spanish Art and Fellow of the LSE Cañada Blanch Centre for Contemporary Spanish Studies andDacia Viejo Rose Lecturer in Heritage in the Department of Archaeology at the University of Cambridge Fellow of Selwyn CollegeProducer: Simon Tillotson.

After 27 years, Melvyn Bragg has decided to step down from the In Our Time presenter’s chair. With over a thousand episodes to choose from, he has selected just six that capture the huge range and depth of the subjects he and his experts have tackled. In this sixth of his choices, we hear Melvyn Bragg and his guests in 2017 discussing new discoveries about dinosaurs.Their topic is the development of theories about dinosaur feathers, following discoveries of fossils which show evidence of those feathers. All dinosaurs were originally thought to be related to lizards (the word 'dinosaur' was created from the Greek for 'terrible lizard') but that now appears false. In the last century, discoveries of fossils with feathers established that at least some dinosaurs were feathered and that some of those survived the great extinctions and evolved into the birds we see today. There are still many outstanding areas for study, such as what sorts of feathers they were, where on the body they were found, what their purpose was and which dinosaurs had them. With Mike Benton Professor of Vertebrate Palaeontology at the University of BristolSteve Brusatte Reader and Chancellor's Fellow in Vertebrate Palaeontology at the University of EdinburghandMaria McNamara Senior Lecturer in Geology at University College, CorkProducer: Simon TillotsonSpanning history, religion, culture, science and philosophy, In Our Time from BBC Radio 4 is essential listening for the intellectually curious. In each episode, host Melvyn Bragg and expert guests explore the characters, events and discoveries that have shaped our world

Melvyn Bragg and guests discuss the conference convened by the victorious powers of the Napoleonic Wars and the earlier French Revolutionary Wars, which had devastated so much of Europe over the last 25 years. The powers aimed to create a long lasting peace, partly by redrawing the map to restore old boundaries and partly by balancing the powers so that none would risk war again. It has since been seen as a very conservative outcome, reasserting the old monarchical and imperial orders over the growth of liberalism and national independence movements, and yet also largely successful in its goal of preventing war in Europe on such a scale for another 100 years. Delegates to Vienna were entertained at night with lavish balls, and the image above is from a French cartoon showing Russia, Prussia, and Austria dancing to the bidding of Castlereagh, the British delegate.With Kathleen Burk Professor Emerita of Modern and Contemporary History at University College LondonTim Blanning Emeritus Professor of Modern European History at the University of CambridgeandJohn Bew Professor in History and Foreign Policy at the War Studies Department at King's College LondonProducer: Simon Tillotson.

Melvyn Bragg and guests discuss Aphra Behn (1640-1689), who made her name and her living as a playwright, poet and writer of fiction under the Restoration. Virginia Woolf wrote of her: ' All women together, ought to let flowers fall upon the grave of Aphra Behn... for it was she who earned them the right to speak their minds'. Behn may well have spent some of her early life in Surinam, the setting for her novel Oroonoko, and there are records of her working in the Netherlands as a spy for Charles II. She was loyal to the Stuart kings, and refused to write a poem on the coronation of William of Orange. She was regarded as an important writer in her lifetime and inspired others to write, but fell out of favour for two centuries after her death when her work was seen as too bawdy, the product of a disreputable age. The image above is from the Yale Center for British Art and is titled 'Aphra Behn, by Sir Peter Lely, 1618-1680' With Janet Todd Former President of Lucy Cavendish College, Cambridge UniversityRos Ballaster Professor of 18th Century Literature at Mansfield College, University of Oxfordand Claire Bowditch Post-doctoral Research Associate in English and Drama at Loughborough UniversityProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the life, reputation and impact of Constantine I, known as Constantine the Great (c280s -337AD). Born in modern day Serbia and proclaimed Emperor by his army in York in 306AD, Constantine became the first Roman Emperor to profess Christianity. He legalised Christianity and its followers achieved privileges that became lost to traditional religions, leading to the steady Christianisation of the Empire. He built a new palace in Byzantium, renaming it Constantinople, as part of the decentralisation of the Empire, an Eastern shift that saw Roman power endure another thousand years there, long after the collapse of the empire in the West. With Christopher Kelly Professor of Classics and Ancient History at the University of Cambridge and President of Corpus Christi CollegeLucy Grig Senior Lecturer in Roman History at the University of Edinburghand Greg Woolf Director of the Institute of Classical Studies, University of LondonProducer: Simon Tillotson.

In a programme first broadcast in 2017, Melvyn Bragg and guests discuss Emily Bronte (1818-1848) and her only novel, published in 1847 under the name 'Ellis Bell' just a year before her death. It is the story of Heathcliff, a foundling from Liverpool brought up in the Earnshaw family at the remote Wuthering Heights, high on the moors, who becomes close to the young Cathy Earnshaw but hears her say she can never marry him. He disappears and she marries his rival, Edgar Linton, of Thrushcross Grange even though she feels inextricably linked with Heathcliff, exclaiming to her maid 'I am Heathcliff!' On his return, Heathcliff steadily works through his revenge on all who he believes wronged him, and their relations. When Cathy dies, Heathcliff longs to be united with her in the grave. The raw passions and cruelty of the story unsettled Emily's sister Charlotte Bronte, whose novel Jane Eyre had been published shortly before, and who took pains to explain its roughness, jealousy and violence when introducing it to early readers. Over time, with its energy, imagination and scope, Wuthering Heights became celebrated as one of the great novels in English.The image above is of Laurence Olivier as Heathcliff and Merle Oberon as Cathy on the set of the Samuel Goldwyn Company movie 'Wuthering Heights', circa 1939.WithKaren O'Brien Professor of English Literature at the University of OxfordJohn Bowen Professor of Nineteenth Century Literature at the University of Yorkand Alexandra Lewis Lecturer in English Literature at the University of AberdeenProducer: Simon Tillotson.

Melvyn Bragg and guests discuss how, in the Enlightenment, Immanuel Kant (1724-1804) sought to define the difference between right and wrong by applying reason, looking at the intention behind actions rather than at consequences. He was inspired to find moral laws by natural philosophers such as Newton and Leibniz, who had used reason rather than emotion to analyse the world around them and had identified laws of nature. Kant argued that when someone was doing the right thing, that person was doing what was the universal law for everyone, a formulation that has been influential on moral philosophy ever since and is known as the Categorical Imperative. Arguably even more influential was one of his reformulations, echoed in The Universal Declaration of Human Rights, in which he asserted that humanity has a value of an entirely different kind from that placed on commodities. Kant argued that simply existing as a human being was valuable in itself, so that every human owed moral responsibilities to other humans and was owed responsibilities in turn.With Alison Hills Professor of Philosophy at St John's College, OxfordDavid Oderberg Professor of Philosophy at the University of ReadingandJohn Callanan Senior Lecturer in Philosophy at King's College, LondonProducer: Simon Tillotson.

Melvyn Bragg and his guests discuss the Central Asian polymath al-Biruni and his eleventh-century book the India.Born in around 973 in the central Asian region of Chorasmia, al-Biruni became an itinerant scholar of immense learning, a master of mathematics, medicine, astronomy and many languages. He corresponded with the age's greatest scientist, Avicenna, and made significant contributions to many fields of knowledge.In 1017 al-Biruni became a member of the court of the ruler Mahmud of Ghazna. Over the course of the next thirteen years he wrote the India, a comprehensive account of Hindu culture which was the first book about India by a Muslim scholar. It contains detailed information about Hindu religion, science and everyday life which have caused some to call it the first work of anthropology.With:James MontgomeryProfessor of Classical Arabic at the University of CambridgeHugh KennedyProfessor of Arabic in the School of Oriental and African Studies at the University of LondonAmira BennisonSenior Lecturer in Middle Eastern and Islamic Studies at the University of CambridgeProducer: Thomas Morris.

After 27 years, Melvyn Bragg has decided to step down from the In Our Time presenter’s chair. With over a thousand episodes to choose from, he has selected just six that capture the huge range and depth of the subjects he and his experts have tackled. In this fourth of his choices, we hear Melvyn Bragg and his guests discuss bird migration. Their topic includes why some birds migrate and others do not, how they select their destinations and how they navigate the great distances, often over oceans. For millennia, humans set their calendars to birds' annual arrivals, and speculated about what happened when they departed, perhaps moving deep under water, or turning into fish or shellfish, or hibernating while clinging to trees upside down. Ideas about migration developed in C19th when, in Germany, a stork was noticed with an African spear in its neck, indicating where it had been over the winter and how far it had flown. Today there are many ideas about how birds use their senses of sight and smell, and magnetic fields, to find their way, and about why and how birds choose their destinations and many questions. Why do some scatter and some flock together, how much is instinctive and how much is learned, and how far do the benefits the migrating birds gain outweigh the risks they face?With Barbara Helm Reader at the Institute of Biodiversity, Animal Health and Comparative Medicine at the University of GlasgowTim Guilford Professor of Animal Behaviour and Tutorial Fellow of Zoology at Merton College, Oxfordand Richard Holland Senior Lecturer in Animal Cognition at Bangor UniversityProducer: Simon Tillotson In Our Time is a BBC Studios ProductionSpanning history, religion, culture, science and philosophy, In Our Time from BBC Radio 4 is essential listening for the intellectually curious. In each episode, host Melvyn Bragg and expert guests explore the characters, events and discoveries that have shaped our world

Is it always better to be just than unjust? That is the central question of Plato's Republic, discussed here by Melvyn Bragg and guests. Writing in c380BC, Plato applied this question both to the individual and the city-state, considering earlier and current forms of government in Athens and potential forms, in which the ideal city might be ruled by philosophers. The Republic is arguably Plato's best known and greatest work, a dialogue between Socrates and his companions, featuring the allegory of the cave and ideas about immortality of the soul, the value of poetry to society, and democracy's vulnerability to a clever demagogue seeking tyranny.With Angie Hobbs Professor of the Public Understanding of Philosophy at the University of SheffieldMM McCabe Professor of Ancient Philosophy Emerita at King's College LondonandJames Warren Fellow of Corpus Christi College and a Reader in Ancient Philosophy at the University of Cambridge Producer: Simon Tillotson.

Melvyn Bragg and guests discuss Alexander Pushkin's verse novel, the story of Eugene Onegin, widely regarded as his masterpiece. Pushkin (pictured above) began this in 1823 and worked on it over the next ten years, while moving around Russia, developing the central character of a figure all too typical of his age, the so-called superfluous man. Onegin is cynical, disillusioned and detached, his best friend Lensky is a romantic poet and Tatyana, whose love for Onegin is not returned until too late, is described as a poetic ideal of a Russian woman, and they are shown in the context of the Russian landscape and society that has shaped them. Onegin draws all three into tragic situations which, if he had been willing and able to act, he could have prevented, and so becomes the one responsible for the misery of himself and others as well as the death of his friend.With Andrew Kahn Professor of Russian Literature at the University of Oxford and Fellow of St Edmund HallEmily Finer Lecturer in Russian and Comparative Literature at the University of St Andrewsand Simon Dixon The Sir Bernard Pares Professor of Russian History at University College LondonProducer: Simon Tillotson.

Melvyn Bragg and guests discuss what, in C19th America's Gilded Age, was one of the most significant protest movements since the Civil War with repercussions well into C20th. Farmers in the South and Midwest felt ignored by the urban and industrial elites who were thriving as the farmers suffered droughts and low prices. The farmers were politically and physically isolated. As one man wrote on his abandoned farm, 'two hundred and fifty miles to the nearest post office, one hundred miles to wood, twenty miles to water, six inches to Hell'. They formed the Populist or People's Party to fight their cause, put up candidates for President, won several states and influenced policies. In the South, though, their appeal to black farmers stimulated their political rivals to suppress the black vote for decades and set black and poor white farmers against each other, tightening segregation. Aspects of the Populists ideas re-emerged effectively in Roosevelt's New Deal, even if they are mainly remembered now, if at all, thanks to allegorical references in The Wizard of Oz.The caricature above is of William Jennings Bryan, Populist-backed Presidential candidate.With Lawrence Goldman Professor of History at the Institute of Historical Research, University of LondonMara Keire Lecturer in US History at the University of OxfordAndChristopher Phelps Associate Professor of American Studies at the University of NottinghamProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the life and works of Christine de Pizan, who wrote at the French Court in the late Middle Ages and was celebrated by Simone de Beauvoir as the first woman to 'take up her pen in defence of her sex.' She wrote across a broad range, and was particularly noted for challenging the depiction of women by famous writers such as Jean de Meun, author of the Romance of the Rose. She has been characterised as an early feminist who argued that women could play a much more important role in society than the one they were allotted, reflected in arguably her most important work, The Book of the City of Ladies, a response to the seemingly endless denigration of women in popular texts of the time.The image above, of Christine de Pizan lecturing, is (c)The British Library Board. Harley 4431, f.259v.With Helen Swift Associate Professor of Medieval French at the University of Oxford and Fellow of St Hilda's CollegeMiranda Griffin Lecturer in French and Fellow of St Catharine's College, Cambridgeand Marilynn Desmond Distinguished Professor of English and Comparative Literature at Binghamton UniversityProducer: Simon Tillotson.

Melvyn Bragg and guests discuss enzymes, the proteins that control the speed of chemical reactions in living organisms. Without enzymes, these reactions would take place too slowly to keep organisms alive: with their actions as catalysts, changes which might otherwise take millions of years can happen hundreds of times a second. Some enzymes break down large molecules into smaller ones, like the ones in human intestines, while others use small molecules to build up larger, complex ones, such as those that make DNA. Enzymes also help keep cell growth under control, by regulating the time for cells to live and their time to die, and provide a way for cells to communicate with each other. With Nigel Richards Professor of Biological Chemistry at Cardiff UniversitySarah Barry Lecturer in Chemical Biology at King's College LondonAnd Jim Naismith Director of the Research Complex at Harwell Bishop Wardlaw Professor of Chemical Biology at the University of St Andrews Professor of Structural Biology at the University of OxfordProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the flourishing of the idea of Purgatory from C12th, when it was imagined as a place alongside Hell and Heaven in which the souls of sinners would be purged of those sins by fire. In the West, there were new systems put in place to pray for the souls of the dead, on a greater scale, with opportunities to buy pardons to shorten time in Purgatory. The idea was enriched with visions, some religious and some literary; Dante imagined Purgatory as a mountain in the southern hemisphere, others such as Marie de France told of The Legend of the Purgatory of Saint Patrick, in which the entrance was on Station Island in County Donegal. This idea of purification by fire had appalled the Eastern Orthodox Church and was one of the factors in the split from Rome in 1054, but flourished in the West up to the reformations of C16th when it was again particularly divisive.WithLaura Ashe Associate Professor of English and fellow of Worcester College at the University of OxfordMatthew Treherne Professor of Italian Literature at the University of LeedsandHelen Foxhall Forbes Associate Professor of Early Medieval History at Durham UniversityProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the life and work of Louis Pasteur (1822-1895) and his extraordinary contribution to medicine and science. It is said few people have saved more lives than Pasteur. A chemist, he showed that otherwise identical molecules could exist as 'left' and 'right-handed' versions and that molecules produced by living things were always left-handed. He proposed a germ theory to replace the idea of spontaneous generation. He discovered that microorganisms cause fermentation and disease. He began the process named after him, pasteurisation, heating liquids to 50-60 C to kill microbes. He saved the beer and wine industries in France when they were struggling with microbial contamination. He saved the French silk industry when he found a way of protecting healthy silkworm eggs from disease. He developed vaccines against anthrax and rabies and helped establish immunology. Many of his ideas were developed further after his lifetime, but one of his legacies was a charitable body, the Pasteur Institute, to continue research into infectious disease.With Andrew Mendelsohn Reader in the School of History at Queen Mary, University of LondonAnne Hardy Honorary Professor at the Centre for History in Public Health at the London School of Hygiene and Tropical Medicineand Michael Worboys Emeritus Professor in the History of Science, Technology and Medicine at the University of Manchester Producer: Simon Tillotson.

To celebrate Melvyn Bragg’s 27 years presenting In Our Time, five well-known fans of the programme have chosen their favourite episodes. Comedian Frank Skinner has picked the episode on the life and work of the poet Emily Dickinson and recorded an introduction to it. (This introduction will be available on BBC Sounds and the In Our Time webpage shortly after the broadcast and will be longer than the version broadcast on Radio 4). Emily Dickinson was arguably the most startling and original poet in America in the C19th. According to Thomas Wentworth Higginson, her correspondent and mentor, writing 15 years after her death, "Few events in American literary history have been more curious than the sudden rise of Emily Dickinson into a posthumous fame only more accentuated by the utterly recluse character of her life and by her aversion to even a literary publicity." That was in 1891 and, as more of Dickinson's poems were published, and more of her remaining letters, the more the interest in her and appreciation of her grew. With her distinctive voice, her abundance, and her exploration of her private world, she is now seen by many as one of the great lyric poets. With Fiona Green Senior Lecturer in English at the University of Cambridge and a Fellow of Jesus CollegeLinda Freedman Lecturer in English and American Literature at University College LondonandParaic Finnerty Reader in English and American Literature at the University of PortsmouthProducer: Simon Tillotson.Reading list:Christopher Benfey, A Summer of Hummingbirds: Love, Art and Scandal in the Intersecting Worlds of Emily Dickinson, Mark Twain, Harriet Beecher Stowe, and Martin Johnson Heade (Penguin Books, 2009)Jed Deppman, Marianne Noble and Gary Lee Stonum (eds.), Emily Dickinson and Philosophy (Cambridge University Press, 2013)Judith Farr, The Gardens of Emily Dickinson (Harvard University Press, 2005)Judith Farr, The Passion of Emily Dickinson (Harvard University Press, 1992)Paraic Finnerty, Emily Dickinson’s Shakespeare (University of Massachusetts Press, 2006)Ralph William Franklin (ed.), The Master Letters of Emily Dickinson (University Massachusetts Press, 1998)Ralph William Franklin (ed.), The Poems of Emily Dickinson: Variorum Edition (Harvard University Press, 1998)Linda Freedman, The Myth of the Fall in Nineteenth-Century Literature (Oxford University Press, 2025), especially chapter 3.Linda Freedman, Emily Dickinson and the Religious Imagination (Cambridge University Press, 2011)Gudrun Grabher, Roland Hagenbüchle and Cristanne Miller (eds.), The Emily Dickinson Handbook (University of Massachusetts Press, 1998)Alfred Habegger, My Wars are Laid Away in Books: The Early Life of Emily Dickinson (Random House, 2001)Ellen Louise Hart and Martha Nell Smith (eds.), Open Me Carefully: Emily Dickinson’s Intimate Letters to Susan Huntington Dickinson (Paris Press, 1998)Virginia Jackson, Dickinson’s Misery: A Theory of Lyric Reading (Princeton University Press, 2013)Thomas H. Johnson (ed.), Emily Dickinson: Selected Letters (first published 1958; Harvard University Press, 1986)Thomas H. Johnson (ed.), Poems of Emily Dickinson (first published 1951; Faber & Faber, 1976)Thomas Herbert Johnson and Theodora Ward (eds.), The Letters of Emily Dickinson (Belknap Press, 1958)Benjamin Lease, Emily Dickinson’s Readings of Men and Books (Palgrave Macmillan, 1990)Mary Loeffelholz, The Value of Emily Dickinson (Cambridge University Press, 2016)James McIntosh, Nimble Believing: Dickinson and the Unknown (University of Michigan Press, 2000)Marietta Messmer, A Vice for Voices: Reading Emily Dickinson’s Correspondence (University of Massachusetts Press, 2001)Cristanne Miller (ed.), Emily Dickinson's Poems: As She Preserved (Harvard University Press, 2016)Cristanne Miller, Reading in Time: Emily Dickinson in the Nineteenth Century (University of Massachusetts Press, 2012)Elizabeth Phillips, Emily Dickinson: Personae and Performance (Pennsylvania State University Press, 1988)Eliza Richards (ed.), Emily Dickinson in Context (Cambridge University Press, 2013)Richard B. Sewall, The Life of Emily Dickinson (first published 1974; Harvard University Press, 1998)Marta L. Werner, Emily Dickinson’s Open Folios: Scenes of Reading, Surfaces of Writing (University of Michigan Press, 1996)Brenda Wineapple, White Heat: The Friendship of Emily Dickinson and Thomas Wentworth Higginson (Anchor Books, 2009)Shira Wolosky, Emily Dickinson: A Voice of War (Yale University Press, 1984)This episode was first broadcast in May 2017.Spanning history, religion, culture, science and philosophy, In Our Time from BBC Radio 4 is essential listening for the intellectually curious. In each episode, host Melvyn Bragg and expert guests explore the people, ideas, events and discoveries that have shaped our worldIn Our Time is a BBC Studios production

Melvyn Bragg and guests discuss The Battle of Lincoln on 20th May 1217, when two armies fought to keep, or to win, the English crown. This was a struggle between the Angevin and Capetian dynasties, one that followed Capetian successes over the Angevins in France. The forces of the new boy-king, Henry III, attacked those of Louis of France, the claimant backed by rebel Barons. Henry's regent, William Marshal, was almost seventy when he led the charge on Lincoln that day, and his victory confirmed his reputation as England's greatest knight. Louis sent to France for reinforcements but in August these, too, were defeated at sea, at the Battle of Sandwich. As part of the peace deal, Henry reissued Magna Carta, which King John had granted in 1215 but soon withdrawn, and Louis went home, leaving England's Anglo-French rulers more Anglo and less French than he had planned. The image above is by Matthew Paris (c1200-1259) from his Chronica Majora (MS 16, f. 55v) and appears with the kind permission of the Master and Fellows of Corpus Christi College, CambridgeWithLouise Wilkinson Professor of Medieval History at Canterbury Christ Church UniversityStephen Church Professor of Medieval History at the University of East AngliaandThomas Asbridge Reader in Medieval History at Queen Mary, University of LondonProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the text and context of The Book of the Dead, also known as the Book of Coming Forth by Day, the ancient Egyptian collections of spells which were intended to help the recently deceased navigate the underworld. They flourished under the New Kingdom from C16th BC until the end of the Ptolemaic era in C1st BC, and drew on much earlier traditions from the walls of pyramids and on coffin cases. Almost 200 spells survive, though no one collection contains all of them, and one of the best known surrounds the weighing of the heart, the gods' final judgement of the deceased's life.With John Taylor Curator at the Department of Ancient Egypt and Sudan at the British MuseumKate Spence Senior Lecturer in Egyptian Archaeology at Cambridge University and Fellow of Emmanuel Collegeand Richard Parkinson Professor of Egyptology at the University of Oxford and Fellow of the Queen's CollegeProducer: Simon Tillotson.

The 13th-century English philosopher Roger Bacon is perhaps best known for his major work the Opus Maius. Commissioned by Pope Clement IV, this extensive text covered a multitude of topics from mathematics and optics to religion and moral philosophy. He is also regarded by some as an early pioneer of the modern scientific method. Bacon's erudition was so highly regarded that he came to be known as 'Doctor Mirabilis' or 'wonderful doctor'. However, he is a man shrouded in mystery. Little is known about much of his life and he became the subject of a number of strange legends, including one in which he allegedly constructed a mechanical brazen head that would predict the future. With:Jack Cunningham Academic Coordinator for Theology at Bishop Grosseteste University, LincolnAmanda Power Associate Professor of Medieval History at the University of Oxford Elly Truitt Associate Professor of Medieval History at Bryn Mawr CollegeProducer: Victoria Brignell.

Melvyn Bragg discusses the life and times of Rosa Luxemburg (1871-1919), 'Red Rosa', who was born in Poland under the Russian Empire and became one of the leading revolutionaries in an age of revolution. She was jailed for agitation and for her campaign against the Great War which, she argued, pitted workers against each other for the sake of capitalism. With Karl Liebknecht and other radicals, she founded the Spartacus League in the hope of ending the war through revolution. She founded the German Communist Party with Liebknecht; with the violence that followed the German Revolution of 1918, her opponents condemned her as Bloody Rosa. She and Liebknecht were seen as ringleaders in the Spartacus Revolt of 1919 and, on 15th January 1919, the Freikorps militia arrested and murdered them. While Luxemburg has faced opposition for her actions and ideas from many quarters, she went on to become an iconic figure in East Germany under the Cold War and a focal point for opposition to the Soviet-backed leadership.With Jacqueline Rose Co-Director of the Birkbeck Institute for the Humanities, Birkbeck, University of LondonMark Jones Irish Research Council fellow at the Centre for War Studies, University College Dublinand Nadine Rossol Senior lecturer in Modern European History at the University of EssexProducer: Simon Tillotson.

After 27 years, Melvyn Bragg has decided to step down from the In Our Time presenter’s chair. With over a thousand episodes to choose from, he has selected just six that capture the huge range and depth of the subjects he and his experts have tackled. In this fifth of his choices, we hear Melvyn Bragg and his guests discuss a key figure from quantum mechanics.Their topic is the life and ideas of Wolfgang Pauli (1900-1958), whose Exclusion Principle is one of the key ideas in quantum mechanics. A brilliant physicist, at 21 Pauli wrote a review of Einstein's theory of general relativity and that review is still a standard work of reference today. The Pauli Exclusion Principle proposes that no two electrons in an atom can be at the same time in the same state or configuration, and it helps explain a wide range of phenomena such as the electron shell structure of atoms. Pauli went on to postulate the existence of the neutrino, which was confirmed in his lifetime. Following further development of his exclusion principle, Pauli was awarded the Nobel Prize in Physics in 1945 for his 'decisive contribution through his discovery of a new law of Nature'. He also had a long correspondence with Jung, and a reputation for accidentally breaking experimental equipment which was dubbed The Pauli Effect.With Frank Close Fellow Emeritus at Exeter College, University of OxfordMichela Massimi Professor of Philosophy of Science at the University of EdinburghandGraham Farmelo Bye-Fellow of Churchill College, University of CambridgeProducer: Simon TillotsonSpanning history, religion, culture, science and philosophy, In Our Time from BBC Radio 4 is essential listening for the intellectually curious. In each episode, host Melvyn Bragg and expert guests explore the characters, events and discoveries that have shaped our world

Melvyn Bragg and guests discuss Katsushika Hokusai (1760-1849), the Japanese artist whose views of Mt Fuji such as The Great Wave off Kanagawa (pictured) are some of the most iconic in world art. He worked as Japan was slowly moving towards greater contact with the outside world, trading with China and allowing two Dutch ships to dock each year. From these ships he picked up new synthetic colours and illustrations with Western compositions, which he incorporated in his traditional wood block prints. The quality of his images helped drive demand for prints among the highly literate Japanese public, particularly those required to travel to Edo under feudal obligations and who wanted to collect all his prints. As well as the quality of his work, Hokusai's success stems partly from his long life and career. He completed some of his most memorable works in his 70s and 80s and claimed he would not reach his best until he was 110.With Angus Lockyer Lecturer in Japanese History at SOAS University of LondonRosina Buckland Senior Curator of Japanese Collections at the National Museum of ScotlandAnd Ellis Tinios Honorary Lecturer in the School of History, University of LeedsProducer: Simon Tillotson.

Melvyn Bragg and guests discuss what is often called one of the most significant battles in history. In 480BC in the Saronic Gulf near Athens, between the mainland and the island of Salamis, a fleet of Greek allies decisively defeated a larger Persian-led fleet. This halted the further Persian conquest of Greece and, at Plataea and Mycale the next year, further Greek victories brought Persian withdrawal and the immediate threat of conquest to an end. To the Greeks, this enabled a flourishing of a culture that went on to influence the development of civilisation in Rome and, later, Europe and beyond. To the Persians, it was a reverse at the fringes of their vast empire but not a threat to their existence, as it was for the Greek states, and attention turned to quelling unrest elsewhere.With Lloyd Llewellyn-Jones Professor in Ancient History at Cardiff UniversityLindsay Allen Lecturer in Greek and Near Eastern History, King's College LondonandPaul Cartledge Emeritus Professor of Greek Culture and AG Leventis Senior Research Fellow at Clare College, University of CambridgeProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the high temperatures that marked the end of the Paleocene and start of the Eocene periods, about 50m years ago. Over c1000 years, global temperatures rose more than 5 C on average and stayed that way for c100,000 years more, with the surface of seas in the Arctic being as warm as those in the subtropics. There were widespread extinctions, changes in ocean currents, and there was much less oxygen in the sea depths. The rise has been attributed to an increase of carbon dioxide and methane in the atmosphere, though it is not yet known conclusively what the source of those gases was. One theory is that a rise in carbon dioxide, perhaps from volcanoes, warmed up the globe enough for warm water to reach the bottom of the oceans and so release methane from frozen crystals in the sea bed. The higher the temperature rose and the longer the water was warm, the more methane was released. Scientists have been studying a range of sources from this long period, from ice samples to fossils, to try to understand more about possible causes. With Dame Jane Francis Professor of Palaeoclimatology at the British Antarctic SurveyMark Maslin Professor of Palaeoclimatology at University College LondonAndTracy Aze Lecturer in Marine Micropaleontology at the University of LeedsProducer: Simon Tillotson.

Melvyn Bragg and guests discuss Elizabeth Gaskell's novel North and South, published in 1855 after serialisation in Dickens' Household Words magazine. It is the story of Margaret Hale, who was raised in the South in the New Forest and London's Harley Street, and then moves North to a smokey mill town, Milton, in Darkshire. As well as Margaret's emotional life and her growing sense of independence, the novel explores the new ways of living thrown up by industrialisation, and the relationships between 'masters and men'. Many of Margaret Hale's experiences echo Gaskell's own life, as she was born in Chelsea and later moved to Manchester, and the novel has become valued for its insights into social conflicts and the changing world in which Gaskell lived.With Sally Shuttleworth Professor of English Literature at the University of OxfordDinah Birch Pro-vice Chancellor for Research and Professor of English Literature at the University of LiverpoolAndJenny Uglow Biographer of Elizabeth GaskellProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the Kuiper Belt, a vast region of icy objects at the fringes of our Solar System, beyond Neptune, in which we find the dwarf planet Pluto and countless objects left over from the origins of the solar system, some of which we observe as comets. It extends from where Neptune is, which is 30 times further out than the Earth is from the Sun, to about 500 times the Earth-Sun distance. It covers an immense region of space and it is the part of the Solar System that we know the least about, because it is so remote from us and has been barely detectable by Earth-based telescopes until recent decades. Its existence was predicted before it was known, and study of the Kuiper Belt, and how objects move within it, has led to a theory that there may be a 9th planet far beyond Neptune.WithCarolin Crawford Public Astronomer at the Institute of Astronomy and Fellow of Emmanuel College, University of CambridgeMonica Grady Professor of Planetary and Space Sciences at the Open UniversityAndStephen Lowry Reader in Planetary and Space Sciences, University of KentProducer: Simon Tillotson.

Melvyn Bragg and guests discuss Seneca the Younger, who was one of the first great writers to live his entire life in the world of the new Roman empire, after the fall of the Republic. He was a Stoic philosopher, he wrote blood-soaked tragedies, he was an orator, and he navigated his way through the reigns of Caligula, Claudius and Nero, sometimes exercising power at the highest level and at others spending years in exile. Agrippina the Younger was the one who called for him to tutor Nero, and it is thought Seneca helped curb some of Nero's excesses. He was later revered within the Christian church, partly for what he did and partly for what he was said to have done in forged letters to St Paul. His tragedies, with their ghosts and high body count, influenced Shakespeare's Titus Andronicus and Hamlet, and Kyd's Spanish Tragedy. The image above is the so-called bust of Seneca, a detail from Four Philosophers by Peter Paul Rubens.WithMary Beard Professor of Classics at the University of CambridgeCatharine Edwards Professor of Classics and Ancient History at Birkbeck, University of LondonandAlessandro Schiesaro Professor of Classics at the University of ManchesterProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the flourishing of maths in the early Islamic world, as thinkers from across the region developed ideas in places such as Baghdad's House of Wisdom. Among them were the Persians Omar Khayyam, who worked on equations, and Al-Khwarizmi, latinised as Algoritmi and pictured above, who is credited as one of the fathers of algebra, and the Jewish scholar Al-Samawal, who converted to Islam and worked on mathematical induction. As well as the new ideas, there were many advances drawing on Indian, Babylonian and Greek work and, thanks to the recording or reworking by mathematicians in the Islamic world, that broad range of earlier maths was passed on to western Europe for further study.With Colva Roney-Dougal Reader in Pure Mathematics at the University of St AndrewsPeter Pormann Professor of Classics & Graeco-Arabic Studies at the University of ManchesterAndJim Al-Khalili Professor of Physics at the University of SurreyProducer: Simon Tillotson.

In a programme first broadcast in 2017, Melvyn Bragg and guests discuss the Northamptonshire poet John Clare who, according to one of Melvyn's guests Jonathan Bate, was 'the greatest labouring-class poet that England has ever produced'. Clare worked in a tavern, as a gardener and as a farm labourer in the early 19th century and achieved his first literary success with Poems Descriptive of Rural Life and Scenery. He was praised for his descriptions of rural England and his childhood there, and his reaction to the changes he saw in the Agricultural Revolution with its enclosures, displacement and altered, disrupted landscape. Despite poor mental health and, from middle age onwards, many years in asylums, John Clare continued to write and he is now seen as one of the great poets of his age.With Sir Jonathan Bate Provost of Worcester College, University of OxfordMina Gorji Senior Lecturer in the English Faculty and fellow of Pembroke College, Cambridgeand Simon Kövesi Professor of English Literature at Oxford Brookes UniversityProducer: Simon Tillotson.

In a programme first broadcast in 2017, Melvyn Bragg and guests discuss the political philosophy of Hannah Arendt. She developed many of her ideas in response to the rise of totalitarianism in the C20th, partly informed by her own experience as a Jew in Nazi Germany before her escape to France and then America. She wanted to understand how politics had taken such a disastrous turn and, drawing on ideas of Greek philosophers as well as her peers, what might be done to create a better political life. Often unsettling, she wrote of 'the banality of evil' when covering the trial of Eichmann, one of the organisers of the Holocaust.WithLyndsey Stonebridge Professor of Modern Literature and History at the University of East AngliaFrisbee Sheffield Lecturer in Philosophy at Girton College, University of CambridgeandRobert Eaglestone Professor of Contemporary Literature and Thought at Royal Holloway, University LondonProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the relationship between parasites and hosts, where one species lives on or in another to the benefit of the parasite but at a cost to the host, potentially leading to disease or death of the host. Typical examples are mistletoe and trees, hookworms and vertebrates, cuckoos and other birds. In many cases the parasite species do so well in or on a particular host that they reproduce much faster and can adapt to changes more efficiently, and it is thought that almost half of all animal species have a parasitic stage in their lifetime. What techniques do hosts have to counter the parasites, and what impact do parasites have on the evolution of their hosts? With Steve Jones Emeritus Professor of Genetics at University College, LondonWendy Gibson Professor of Protozoology at the University of Bristoland Kayla King Associate Professor in the Department of Zoology at the University of OxfordProducer: Simon Tillotson.