In Our Time

Melvyn Bragg and guests discuss how scientists sought to understand the properties of gases and the relationship between pressure and volume, and what that search unlocked. Newton theorised that there were static particles in gases that pushed against each other all the harder when volume decreased, hence the increase in pressure. Those who argued that molecules moved, and hit each other, were discredited until James Maxwell and Ludwig Boltzmann used statistics to support this kinetic theory. Ideas about atoms developed in tandem with this, and it came as a surprise to scientists in C20th that the molecules underpinning the theory actually existed and were not simply thought experiments. The image above is of Ludwig Boltzmann from a lithograph by Rudolf Fenzl, 1898With Steven Bramwell Professor of Physics at University College LondonIsobel Falconer Reader in History of Mathematics at the University of St Andrewsand Ted Forgan Emeritus Professor of Physics at the University of BirminghamProducer: Simon Tillotson

Melvyn Bragg and guests discuss the French philosopher Henri Bergson (1859-1941) and his ideas about human experience of time passing and how that differs from a scientific measurement of time, set out in his thesis on 'Time and Free Will' in 1889. He became famous in France and abroad for decades, rivalled only by Einstein and, in the years after the Dreyfus Affair, was the first ever Jewish member of the Académie Française. It's thought his work influenced Proust and Woolf, and the Cubists. He died in 1941 from a cold which, reputedly, he caught while queuing to register as a Jew, refusing the Vichy government's offer of exemption.WithKeith Ansell-Pearson Professor of Philosophy at the University of WarwickEmily Thomas Assistant Professor in Philosophy at Durham UniversityAnd Mark Sinclair Reader in Philosophy at the University of RoehamptonProducer: Simon Tillotson

Melvyn Bragg and guests discuss the most destructive riots in London's history, which reached their peak on 7th June 1780 as troops fired on the crowd outside the Bank of England. The leader was Lord George Gordon, head of the Protestant Association, who objected to the relaxing of laws against Catholics. At first the protest outside Parliament was peaceful but, when Gordon's petition failed to persuade the Commons, rioting continued for days until the military started to shoot suspects in the street. It came as Britain was losing the war to hold on to colonies in North America.The image above shows a crowd setting fire to Newgate Prison and freeing prisoners by the authority of 'His Majesty, King Mob.'WithIan Haywood Professor of English at the University of RoehamptonCatriona Kennedy Senior Lecturer in Modern British and Irish History and Director of the Centre for Eighteenth Century Studies at the University of Yorkand Mark Knights Professor of History at the University of WarwickProducer: Simon Tillotson

Melvyn Bragg and guests discuss the life of Nero (37-68 AD) who became Emperor at the age of 16. At first he was largely praised for his generosity yet became known for his debauched lifestyle, with allegations he started the Fire of Rome, watching the flames as he played the lyre. Christians saw him as their persecutor, an anti-Christ, and the number of the Beast in the Book of Revelation was thought to indicate Nero. He had confidence in his own artistry, took up acting (which then had a very low status) and, as revolts in the empire grew, killed himself after the Senate condemned him to die as a slave, on a cross. With Maria Wyke Professor of Latin at University College LondonMatthew Nicholls Fellow and Senior Tutor at St John’s College, University of OxfordAnd Shushma Malik Lecturer in Classics at the University of RoehamptonProducer: Simon Tillotson

Melvyn Bragg and guests discuss one of Shakespeare's most popular works, written c1595 in the last years of Elizabeth I. It is a comedy of love and desire and their many complications as well as their simplicity, and a reflection on society's expectations and limits. It is also a quiet critique of Elizabeth and her vulnerability and on the politics of the time, and an exploration of the power of imagination.With Helen Hackett Professor of English Literature and Leverhulme Research Fellow at University College LondonTom Healy Professor of Renaissance Studies at the University of Sussexand Alison Findlay Professor of Renaissance Drama at Lancaster University and Chair of the British Shakespeare AssociationProducer: Simon Tillotson

Melvyn Bragg and guests discuss theories about the origins of teeth in vertebrates, and what we can learn from sharks in particular and their ancestors. Great white sharks can produce up to 100,000 teeth in their lifetimes. For humans, it is closer to a mere 50 and most of those have to last from childhood. Looking back half a billion years, though, the ancestors of sharks and humans had no teeth in their mouths at all, nor jaws. They were armoured fish, sucking in their food. The theory is that either their tooth-like scales began to appear in mouths as teeth, or some of their taste buds became harder. If we knew more about that, and why sharks can regenerate their teeth, then we might learn how humans could grow new teeth in later lives. With Gareth Fraser Assistant Professor in Biology at the University of FloridaZerina Johanson Merit Researcher in the Department of Earth Sciences at the Natural History Museumand Philip Donoghue Professor of Palaeobiology at the University of BristolProducer: Simon Tillotson

Melvyn Bragg and guests discuss why the potato crop failures in the 1840s had such a catastrophic impact in Ireland. It is estimated that one million people died from disease or starvation after the blight and another two million left the country within the decade. There had been famines before, but not on this scale. What was it about the laws, attitudes and responses that made this one so devastating?The image above is from The Illustrated London News, Dec. 29, 1849, showing a scalp or shelter, "a hole, surrounded by pools, and three sides of the scalp were dripping with water, which ran in small streams over the floor and out by the entrance. The poor inhabitants said they would be thankful if the landlord would leave them there, and the Almighty would spare their lives. Its principal tenant is Margaret Vaughan."With Cormac O'Grada Professor Emeritus in the School of Economics at University College DublinNiamh Gallagher University Lecturer in Modern British and Irish History at the University of CambridgeAnd Enda Delaney Professor of Modern History and School Director of Research at the University of EdinburghProducer: Simon Tillotson

Melvyn Bragg and guests discuss the effective partition of England in the 880s after a century of Viking raids, invasions and settlements. Alfred of Wessex, the surviving Anglo-Saxon king and Guthrum, a Danish ruler, had fought each other to a stalemate and came to terms, with Guthrum controlling the land to the east (once he had agreed to convert to Christianity). The key strategic advantage the invaders had was the Viking ships which were far superior and enabled them to raid from the sea and up rivers very rapidly. Their Great Army had arrived in the 870s, conquering the kingdom of Northumbria and occupying York. They defeated the king of Mercia and seized part of his land. They killed the Anglo-Saxon king of East Anglia and gained control of his territory. It was only when a smaller force failed to defeat Wessex that the Danelaw came into being, leaving a lasting impact on the people and customs of that area.With Judith Jesch Professor of Viking Studies at the University of NottinghamJohn Hines Professor of Archaeology at Cardiff UniversityAndJane Kershaw ERC Principal Investigator in Archaeology at the University of OxfordProducer: Simon Tillotson

Melvyn Bragg and guests discuss the life and works of Hopkins (1844-89), a Jesuit priest who at times burned his poems and at others insisted they should not be published. His main themes are how he, nature and God relate to each other. His friend Robert Bridges preserved Hopkins' poetry and, once printed in 1918, works such as The Windhover, Pied Beauty and As Kingfishers Catch Fire were celebrated for their inventiveness and he was seen as a major poet, perhaps the greatest of the Victorian age. WithCatherine Phillips R J Owens Fellow in English at Downing College, University of CambridgeJane Wright Senior Lecturer in English Literature at the University of Bristoland Martin Dubois Assistant Professor in Nineteenth Century Literature at Durham UniversityProducer: Simon Tillotson

Melvyn Bragg and guests discuss what it means to be oneself, a question explored by philosophers from Aristotle to the present day, including St Augustine, Kierkegaard, Heidegger and Sartre. In Hamlet, Polonius said 'To thine own self be true', but what is the self, and what does it mean to be true to it, and why should you be true? To Polonius, if you are true to yourself, ‘thou canst not be false to any man’ - but with the rise of the individual, authenticity became a goal in itself, regardless of how that affected others. Is authenticity about creating yourself throughout your life, or fulfilling the potential with which you were born, connecting with your inner child, or something else entirely? What are the risks to society if people value authenticity more than morality - that is, if the two are incompatible? The image above is of Sartre, aged 8 months, perhaps still connected to his inner child.With Sarah Richmond Associate Professor in Philosophy at University College LondonDenis McManus Professor of Philosophy at the University of Southamptonand Irene McMullin Senior Lecturer in Philosophy at the University of EssexProducer: Simon Tillotson

Melvyn Bragg and guests discuss the impact on the British Isles of William Cecil, 1st Baron Burghley, the most poweful man in the court of Elizabeth I. He was both praised and attacked for his flexibility, adapting to the reigns of Protestant and Catholic monarchs and, under Elizabeth, his goal was to make England strong, stable and secure from attack from its neighbours. He sought control over Ireland and persuaded Elizabeth that Mary Queen of Scots must die, yet often counselled peace rather than war in the interests of prosperity. With Diarmaid MacCulloch Professor of the History of the Church at the University of OxfordSusan Doran Professor of Early Modern British History at the University of Oxfordand John Guy Fellow of Clare College, University of CambridgeProducer: Simon Tillotson

Melvyn Bragg and guests discuss the life, works, context and legacy of Antarah (525-608AD), the great poet and warrior. According to legend, he was born a slave; his mother was an Ethiopian slave, his father an elite Arab cavalryman. Antarah won his freedom in battle and loved a woman called Abla who refused him, and they were later celebrated in the saga of Antar and Abla. One of Antarah's poems was so esteemed in pre-Islamic Arabia that it is believed it was hung up on the wall of the Kaaba in Mecca. With James Montgomery Sir Thomas Adams's Professor of Arabic at the University of CambridgeMarlé Hammond Senior Lecturer in Arabic Popular Literature and Culture at SOAS, University of LondonAnd Harry Munt Lecturer in Medieval History at the University of YorkProducer: Simon Tillotson

Melvyn Bragg and guests discuss how members of the same species send each other invisible chemical signals to influence the way they behave. Pheromones are used by species across the animal kingdom in a variety of ways, such as laying trails to be followed, to raise the alarm, to scatter from predators, to signal dominance and to enhance attractiveness and, in honey bees, even direct development into queen or worker. The image above is of male and female ladybirds that have clustered together in response to pheromones. With Tristram Wyatt Senior Research Fellow at the Department of Zoology at the University of OxfordJane Hurst William Prescott Professor of Animal Science at the University of Liverpooland Francis Ratnieks Professor of Apiculture and Head of the Laboratory of Apiculture and Social Insects at the University of SussexProducer: Simon Tillotson

Melvyn Bragg and guests discuss how artists from the Middle Ages onwards have been inspired by the Bible story of the widow who killed an Assyrian general who was besieging her village, and so saved her people from his army and from his master Nebuchadnezzar. A symbol of a woman's power and the defiance of political tyranny, the image of Judith has been sculpted by Donatello, painted on the ceiling of the Sistine Chapel and, in the case of Caravaggio, Liss and Artemisia Gentileschi, been shown with vivid, disturbing detail. What do these interpretations reveal of the attitudes to power and women in their time, and of the artists' own experiences? The image of Judith, above is from a tapestry in the Duomo, Milan, by Giovanni or Nicola Carcher, 1555With Susan Foister Curator of Early Netherlandish, German and British Painting at the National GalleryJohn Gash Senior Lecturer in History of Art at the University of AberdeenAnd Ela Nutu Hall Research Associate at the Sheffield Institute for Interdisciplinary Biblical Studies, at the University of SheffieldProducer: Simon Tillotson

Melvyn Bragg and guests discuss the remarkable achievement of Aristotle (384-322BC) in the realm of biological investigation, for which he has been called the originator of the scientific study of life. Known mainly as a philosopher and the tutor for Alexander the Great, who reportedly sent him animal specimens from his conquests, Aristotle examined a wide range of life forms while by the Sea of Marmara and then on the island of Lesbos. Some ideas, such as the the spontaneous generation of flies, did not survive later scrutiny, yet his influence was extraordinary and his work was unequalled until the early modern period.The image above is of the egg and embryo of a dogfish, one of the animals Aristotle described accurately as he recorded their development.WithArmand Leroi Professor of Evolutionary Development Biology at Imperial College LondonMyrto Hatzimichali Lecturer in Classics at the University of CambridgeAndSophia Connell Lecturer in Philosophy at Birkbeck, University of LondonProducer: Simon Tillotson

Melvyn Bragg and guests discuss the life of the Welsh nobleman, also known as Owen Glendower, who began a revolt against Henry IV in 1400 which was at first very successful. Glyndwr (c1359-c1415) adopted the title Prince of Wales and established a parliament and his own foreign policy, until he was defeated by the future Henry V. Owain Glyndwr escaped and led guerilla attacks for several years but was never betrayed to the English, disappearing without trace.With Huw Pryce Professor of Welsh History at Bangor UniversityHelen Fulton Professor of Medieval Literature at the University of BristolChris Given-Wilson Emeritus Professor of Medieval History at the University of St AndrewsProducer: Simon Tillotson

Melvyn Bragg and guests discuss the ideas and life of one of the greatest mathematicians of the 20th century, Emmy Noether. Noether’s Theorem is regarded as one of the most important mathematical theorems, influencing the evolution of modern physics. Born in 1882 in Bavaria, Noether studied mathematics at a time when women were generally denied the chance to pursue academic careers and, to get round objections, she spent four years lecturing under a male colleague’s name. In the 1930s she faced further objections to her teaching, as she was Jewish, and she left for the USA when the Nazis came to power. Her innovative ideas were to become widely recognised and she is now considered to be one of the founders of modern algebra.With Colva Roney Dougal Professor of Pure Mathematics at the University of St AndrewsDavid Berman Professor in Theoretical Physics at Queen Mary, University of LondonElizabeth Mansfield Professor of Mathematics at the University of Kent Producer: Simon Tillotson

Melvyn Bragg and guests discuss Samuel Beckett (1906 - 1989), who lived in Paris and wrote his plays and novels in French, not because his French was better than his English, but because it was worse. In works such as Waiting for Godot, Endgame, Molloy and Malone Dies, he wanted to show the limitations of language, what words could not do, together with the absurdity and humour of the human condition. In part he was reacting to the verbal omnipotence of James Joyce, with whom he’d worked in Paris, and in part to his experience in the French Resistance during World War 2, when he used code, writing not to reveal meaning but to conceal it.WithSteven Connor Professor of English at the University of CambridgeLaura Salisbury Professor of Modern Literature at the University of ExeterAnd Mark Nixon Associate Professor in Modern Literature at the University of Reading and co-director of the Beckett International FoundationProducer: Simon Tillotson

Melvyn Bragg and guests discuss why, in 1870, the Vatican Council issued the decree ‘pastor aeternus’ which, among other areas, affirmed papal infallibility. It meant effectively that the Pope could not err in his teachings, an assertion with its roots in the early Church when the bishop of Rome advanced to being the first among equals, then overall head of the Christian Church in the West. The idea that the Pope could not err had been a double-edged sword from the Middle Ages, though; while it apparently conveyed great power, it also meant a Pope was constrained by whatever a predecessor had said. If a later Pope were to contradict an earlier Pope, then one of them must be wrong, and how could that be…if both were infallible?WithTom O’Loughlin Professor of Historical Theology at the University of NottinghamRebecca Rist Professor in Medieval History at the University of ReadingAnd Miles Pattenden Departmental Lecturer in Early Modern History at the University of OxfordProducer: Simon Tillotson and Julia Johnson

Melvyn Bragg and guests discuss the planet Venus which is both the morning star and the evening star, rotates backwards at walking speed and has a day which is longer than its year. It has long been called Earth’s twin, yet the differences are more striking than the similarities. Once imagined covered with steaming jungles and oceans, we now know the surface of Venus is 450 degrees celsius, and the pressure there is 90 times greater than on Earth, enough to crush an astronaut. The more we learn of it, though, the more we learn of our own planet, such as whether Earth could become more like Venus in some ways, over time. WithCarolin Crawford Public Astronomer at the Institute of Astronomy and Fellow of Emmanuel College, University of CambridgeColin Wilson Senior Research Fellow in Planetary Science at the University of OxfordAnd Andrew Coates Professor of Physics at Mullard Space Science Laboratory, University College LondonProduced by: Simon Tillotson and Julia Johnson

Melvyn Bragg and guests discuss how, from 1834, poor people across England and Wales faced new obstacles when they could no longer feed or clothe themselves, or find shelter. Parliament, in line with the ideas of Jeremy Bentham and Thomas Malthus, feared hand-outs had become so attractive, they stopped people working to support themselves, and encouraged families to have more children than they could afford. To correct this, under the New Poor Laws it became harder to get any relief outside a workhouse, where families would be separated, husbands from wives, parents from children, sisters from brothers. Many found this regime inhumane, while others protested it was too lenient, and it lasted until the twentieth century.The image above was published in 1897 as New Year's Day in the Workhouse.WithEmma Griffin Professor of Modern British History at the University of East AngliaSamantha Shave Lecturer in Social Policy at the University of LincolnAnd Steven King Professor of Economic and Social History at the University of LeicesterProducer: Simon Tillotson

In a programme first broadcast in 2018, Melvyn Bragg and guests discuss one of the jewels of medieval English poetry. It was written c1400 by an unknown poet and then was left hidden in private collections until the C19th when it emerged. It tells the story of a giant green knight who disrupts Christmas at Camelot, daring Gawain to cut off his head with an axe if he can do the same to Gawain the following year. Much to the surprise of Arthur's court, who were kicking the green head around, the decapitated body reaches for his head and rides off, leaving Gawain to face his promise and his apparently inevitable death the following Christmas.The illustration above is ©British Library Board Cotton MS Nero A.x, article 3, ff.94v95With Laura Ashe Professor of English Literature at Worcester College, University of OxfordAd Putter Professor of Medieval English Literature at the University of BristolAnd Simon Armitage Poet and Professor of Poetry at the Universities of Leeds and OxfordProducer: Simon Tillotson

Melvyn Bragg and guests discuss the war in Europe which begain in 1618 and continued on such a scale and with such devastation that its like was not seen for another three hundred years. It pitched Catholics against Protestants, Lutherans against Calvinists and Catholics against Catholics across the Holy Roman Empire, drawing in their neighbours and it lasted for thirty gruelling years, from the Defenestration of Prague to the Peace of Westphalia of 1648. Many more civilians died than soldiers, and famine was so great that even cannibalism was excused. This topic was chosen from several hundred suggested by listeners this autumn.The image above is a detail from a painting of The Battle of White Mountain on 7-8 November 1620, by Pieter Snayers (1592-1667)WithPeter Wilson Chichele Professor of the History of War at the University of OxfordUlinka Rublack Professor of Early Modern European History at the University of Cambridge and Fellow of St John’s CollegeAndToby Osborne Associate Professor in History at Durham UniversityProducer: Simon Tillotson

Melvyn Bragg and guests discuss a foundation story for China as it was reshaped under Mao Zedong. In October 1934, around ninety thousand soldiers of the Red Army broke out of a siege in Jiangxi in the south east of the country, hoping to find a place to regroup and rebuild. They were joined by other armies, and this turned into a very long march to the west and then north, covering thousands of miles of harsh and hostile territory, marshes and mountains, pursued by forces of the ruling Kuomintang for a year. Mao Zedong was among the marchers and emerged at the head of them, and he ensured the officially approved history of the Long March would be an inspiration and education for decades to come.WithRana Mitter Professor of the History and Politics of Modern China and Fellow of St Cross College, University of OxfordSun Shuyun Historian, writer of 'The Long March' and film makerAndJulia Lovell Professor in Modern Chinese History and Literature at Birkbeck, University of LondonProducer: Simon Tillotson

Melvyn Bragg and guests discuss the philosophy of hope. To the ancient Greeks, hope was closer to self-deception, one of the evils left in Pandora's box or jar, in Hesiod's story. In Christian tradition, hope became one of the theological virtues, the desire for divine union and the expectation of receiving it, an action of the will rather than the intellect. To Kant, 'what may I hope' was one of the three basic questions which human reason asks, while Nietzsche echoed Hesiod, arguing that leaving hope in the box was a deception by the gods, reflecting human inability to face the demands of existence. Yet even those critical of hope, like Camus, conceded that life was nearly impossible without it.WithBeatrice Han-Pile Professor of Philosophy at the University of EssexRobert Stern Professor of Philosophy at the University of SheffieldAndJudith Wolfe Professor of Philosophical Theology at the University of St AndrewsProducer: Simon Tillotson

Melvyn Bragg and guests discuss Horace (65-8BC), who flourished under the Emperor Augustus. He was one of the greatest poets of his age and is one of the most quoted of any age. Carpe diem, nil desperandum, nunc est bibendum – that’s Horace. He was the son of a freedman from southern Italy and, thanks to his talent, achieved high status in Rome despite fighting on the losing side in the civil wars. His Odes are widely thought his most enduring works, yet he also wrote his scurrilous Epodes, some philosophical Epistles and broad Satires. He’s influenced poets ever since, including those such as Wilfred Owen who rejected his line: ‘dulce et decorum est pro patria mori’.With Emily Gowers Professor of Latin Literature at the University of Cambridge and Fellow of St John’s CollegeWilliam Fitzgerald Professor of Latin Language and Literature at King’s College Londonand Ellen O’Gorman Senior Lecturer in Classics at the University of BristolProducer: Simon Tillotson

In a programme first broadcast in November 2018, Melvyn Bragg and guests discuss the Austrian princess Maria Antonia, child bride of the future French King Louis XVI. Their marriage was an attempt to bring about a major change in the balance of power in Europe and to undermine the influence of Prussia and Great Britain, but she had no say in the matter and was the pawn of her mother, the Empress Maria Theresa. She fulfilled her allotted role of supplying an heir, but was sent to the guillotine in 1793 in the French Revolution, a few months after her husband, following years of attacks on her as a woman who, it was said, betrayed the King and as a foreigner who betrayed France to enemy powers. When not doing these wrongs, she was said to be personally bankrupting France. Her death shocked royal families throughout Europe, and she became a powerful symbol of the consequences of the Revolution. With Catriona Seth Marshal Foch Professor of French Literature at the University of OxfordKatherine Astbury Professor of French Studies at the University of WarwickandDavid McCallam Reader in French Eighteenth-Century Studies at the University of SheffieldProducer: Simon Tillotson

Melvyn Bragg and guests discuss the properties of atoms or molecules with a single unpaired electron, which tend to be more reactive, keen to seize an electron to make it a pair. In the atmosphere, they are linked to reactions such as rusting. Free radicals came to prominence in the 1950s with the discovery that radiation poisoning operates through free radicals, as it splits water molecules and produces a very reactive hydroxyl radical which damages DNA and other molecules in the cell. There is also an argument that free radicals are a byproduct of normal respiration and over time they cause an accumulation of damage that is effectively the process of ageing. For all their negative associations, free radicals play an important role in signalling and are also linked with driving cell division, both cancer and normal cell division, even if they tend to become damaging when there are too many of them.With Nick Lane Professor of Evolutionary Biochemistry at University College LondonAnna Croft Associate Professor at the Department of Chemical and Environmental Engineering at the University of NottinghamAnd Mike Murphy Professor of Mitochondrial Redox Biology at Cambridge UniversityProducer: Simon Tillotson

Melvyn Bragg and guests discuss Bernard Mandeville (1670-1733) and his critique of the economy as he found it in London, where private vices were condemned without acknowledging their public benefit. In his poem The Grumbling Hive (1705), he presented an allegory in which the economy collapsed once knavish bees turned honest. When republished with a commentary, The Fable of the Bees was seen as a scandalous attack on Christian values and Mandeville was recommended for prosecution for his tendency to corrupt all morals. He kept writing, and his ideas went on to influence David Hume and Adam Smith, as well as Keynes and Hayek.With David Wootton Anniversary Professor of History at the University of YorkHelen Paul Lecturer in Economics and Economic History at the University of SouthamptonAnd John Callanan Senior Lecturer in Philosophy at King’s College LondonProducer: Simon Tillotson

In the second of two programmes marking In Our Time's 20th anniversary on 15th October, Melvyn Bragg and guests discuss Shakespeare's versions of history, continuing with the Roman plays. Rome was the setting for Titus Andronicus, Julius Caesar, Coriolanus and parts of Antony and Cleopatra and these plays gave Shakespeare the chance to explore ideas too controversial for English histories. How was Shakespeare reimagining Roman history, and what impact has that had on how we see Rome today? The image above is of Marlon Brando playing Mark Antony in a scene from the film version of Shakespeare's Julius Caesar, 1953WithSir Jonathan Bate Provost of Worcester College, University of OxfordCatherine Steel Professor of Classics and Dean of Research in the College of Arts at the University of GlasgowAnd Patrick Gray Associate Professor of English Studies at Durham UniversityProducer: Simon Tillotson

In the first of two programmes marking In Our Time's 20th anniversary on 15th October, Melvyn Bragg and guests discuss Shakespeare's versions of history, starting with the English Plantagenets. His eight plays from Richard II to Richard III were written out of order, in the Elizabethan era, and have had a significant impact on the way we see those histories today. In the second programme, Melvyn discusses the Roman plays.The image above is of Richard Burton (1925 - 1984) as Henry V in the Shakespeare play of the same name, from 1951WithEmma Smith Professor of Shakespeare Studies at Hertford College, University of OxfordGordon McMullan Professor of English at King’s College London and Director of the London Shakespeare CentreAnd Katherine Lewis Senior Lecturer in Medieval History at the University of HuddersfieldProducer: Simon Tillotson

Melvyn Bragg and guests discuss the works of Wharton (1862-1937) such as The Age of Innocence for which she won the Pulitzer Prize and was the first woman to do so, The House of Mirth, and The Custom of the Country. Her novels explore the world of privileged New Yorkers in the Gilded Age of the late C19th, of which she was part, drawing on her own experiences and written from the perspective of the new century, either side of WW1 . Among her themes, she examined the choices available to women and the extent to which they could ever really be free, even if rich. With Dame Hermione Lee Biographer, former President of Wolfson College, OxfordBridget Bennett Professor of American Literature and Culture at the University of LeedsAndLaura Rattray Reader in North American Literature at the University of GlasgowProducer: Simon Tillotson

Melvyn Bragg and guests discuss the ideas and life of the German theologian, born in Breslau/Wroclaw in 1906 and killed in the Flossenbürg concentration camp on 9th April 1945. Bonhoeffer developed ideas about the role of the Church in the secular world, in particular Germany after the Nazis took power in 1933 and demanded the Churches' support. He strongly opposed anti-Semitism and, with a role in the Military Intelligence Department, took part in the resistance, plotting to kill Hitler and meeting with contacts in the Allies. Bonhoeffer's ideas on Christian ethics and the relationship between Christianity and humanism spread more widely from the 1960s with the discovery of unpublished works, including those written in prison as he awaited execution.With Stephen Plant Dean and Runcie Fellow at Trinity Hall at the University of CambridgeEleanor McLaughlin Lecturer in Theology and Ethics at the University of Winchester and Lecturer in Ethics at Regent’s Park College at the University of OxfordAnd Tom Greggs Marischal Chair of Divinity at the University of AberdeenProducer: Simon Tillotson

Melvyn Bragg and guests discuss the history of real and imagined machines that appear to be living, and the questions they raise about life and creation. Even in myth they are made by humans, not born. The classical Greeks built some and designed others, but the knowledge of how to make automata and the principles behind them was lost in the Latin Christian West, remaining in the Greek-speaking and Arabic-speaking world. Western travellers to those regions struggled to explain what they saw, attributing magical powers. The advance of clockwork raised further questions about what was distinctly human, prompting Hobbes to argue that humans were sophisticated machines, an argument explored in the Enlightenment and beyond.The image above is Jacques de Vaucanson's mechanical duck (1739), which picked up grain, digested and expelled it. If it looks like a duck...with Simon Schaffer Professor of History of Science at Cambridge UniversityElly Truitt Associate Professor of Medieval History at Bryn Mawr CollegeAnd Franziska Kohlt Doctoral Researcher in English Literature and the History of Science at the University of OxfordProducer: Simon Tillotson

Melvyn Bragg and guests discuss the great epic poem attributed to Homer, telling the story of an intense episode in the Trojan War. It is framed by the wrath of the Greek hero Achilles, insulted by his leader Agamemnon and withdrawing from the battle that continued to rage, only returning when his close friend Patroclus is killed by the Trojan hero Hector. Achilles turns his anger from Agamemnon to Hector and the fated destruction of Troy comes ever closer. With Edith Hall Professor of Classics at King's College LondonBarbara Graziosi Professor of Classics at Princeton UniversityAnd Paul Cartledge A.G. Leventis Senior Research Fellow and Emeritus Professor of Greek Culture at Clare College, CambridgeProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the ideas of William Morris, known in his lifetime for his poetry and then his contribution to the Arts and Crafts movement, and increasingly for his political activism. He felt the world had given in to drudgery and ugliness and he found inspiration in the time before industrialisation, in the medieval life which was about fellowship and association and ways of working which resisted the division of labour and allowed the worker to exercise his or her imagination. Seeing a disconnection between art and society, his solution was revolution which in his view was the only way to reset their relationship.The image above is from the Strawberry Thief wallpaper design by William Morris.With Ingrid Hanson Lecturer in 18th and 19th Century Literature at the University of ManchesterMarcus Waithe University Senior Lecturer in English Literature at the University of Cambridge and Fellow of Magdalene CollegeAndJane Thomas Professor of Victorian and Early 20th Century Literature at the University of HullProducer: Simon Tillotson.

Melvyn and guests discuss the 1846-48 conflict after which the United States of Mexico lost half its territory to the United States of America. The US gained land covered by the states of Texas, Utah, California, New Mexico, Nevada, Arizona and part of Colorado. The outcome had a profound impact on Native Americans and led to civil war in defeated Mexico. It also raised the question of whether slavery would be legal in this acquired territory - something that would only be resolved in the US Civil War, which this victory hastened.With Frank Cogliano Professor of American History at the University of EdinburghJacqueline Fear-Segal Professor of American and Indigenous Histories at the University of East AngliaAndThomas Rath Lecturer in Latin American History at University College LondonProducer: Simon Tillotson.

Melvyn Bragg and guests discuss how some bats, dolphins and other animals emit sounds at high frequencies to explore their environments, rather than sight. This was such an unlikely possibility, to natural historians from C18th onwards, that discoveries were met with disbelief even into the C20th; it was assumed that bats found their way in the dark by touch. Not all bats use echolocation, but those that do have a range of frequencies for different purposes and techniques for preventing themselves becoming deafened by their own sounds. Some prey have evolved ways of detecting when bats are emitting high frequencies in their direction, and some fish have adapted to detect the sounds dolphins use to find them. With Kate Jones Professor of Ecology and Biodiversity at University College LondonGareth Jones Professor of Biological Sciences at the University of BristolAndDean Waters Lecturer in the Environment Department at the University of YorkProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the ideas of Charles-Louis de Secondat, Baron de La Brède et de Montesquieu (1689-1755) whose works on liberty, monarchism, despotism, republicanism and the separation of powers were devoured by intellectuals across Europe and New England in the eighteenth century, transforming political philosophy and influencing the American Constitution. He argued that an individual's liberty needed protection from the arm of power, checking that by another power; where judicial, executive and legislative power were concentrated in the hands of one figure, there could be no personal liberty. With Richard Bourke Professor in the History of Political Thought at Queen Mary, University of LondonRachel Hammersley Senior Lecturer in Intellectual History at Newcastle UniversityAndRichard Whatmore Professor of Modern History at the University of St Andrews and Director of the St Andrews Institute of Intellectual HistoryProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the role of the great 'City of the Persians' founded by Darius I as the ceremonial capital of the Achaemenid Empire that stretched from the Indus Valley to Egypt and the coast of the Black Sea. It was known as the richest city under the sun and was a centre at which the Empire's subject peoples paid tribute to a succession of Achaemenid leaders, until the arrival of Alexander III of Macedon who destroyed it by fire supposedly in revenge for the burning of the Acropolis in Athens.The image above is a detail from a relief at the Apadana, the huge audience hall, and shows a lion attacking a bull.With Lloyd Llewellyn-Jones Professor of Ancient History at Cardiff UniversityVesta Sarkhosh Curtis Curator of Middle Eastern Coins at the British MuseumAndLindsay Allen Lecturer in Greek and Near Eastern History at King's College LondonProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the great Norwegian playwright and poet, best known for his middle class tragedies such as The Wild Duck, Hedda Gabler, A Doll's House and An Enemy of the People. These are set in a world where the middle class is dominant and explore the qualities of that life, its weaknesses and boundaries and the ways in which it takes away freedoms. It is the women who fare the worst in this society, something Ibsen explored in A Doll's House among others, a play that created a sensation with audiences shocked to watch a woman break free of her bourgeois family life to find her destiny. He explored dark secrets such as incest and, in Ghosts, hereditary syphilis, which attracted the censors. He gave actresses parts they had rarely had before, and audiences plays that, after Shakespeare, became the most performed in the world.With Tore Rem Professor of English Literature at the University of OsloKirsten Shepherd-Barr Professor of English and Theatre Studies and Tutorial Fellow, St Catherine's College at the University of OxfordAnd Dinah Birch Professor of English Literature and Pro-Vice Chancellor for Cultural Engagement at the University of LiverpoolProducer: Simon Tillotson.

Melvyn Bragg and guests discuss one of the most remarkable queens of the Middle Ages who took control when her husband, Henry VI, was incapable. Margaret of Anjou (1430-1482) wanted Henry to stay in power for the sake of their son, the heir to the throne, and her refusal to back down was seen by her enemies as a cause of the great dynastic struggle of the Wars of the Roses. The image above is from the Talbot Shrewsbury Book, showing John Talbot, 1st Earl of Shrewsbury, presenting Margaret with that book on her betrothal to HenryWithKatherine Lewis Senior Lecturer in Medieval History at the University of HuddersfieldJames Ross Reader in Late Medieval History at the University of WinchesterAnd Joanna Laynesmith Visiting Research Fellow at the University of ReadingProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the 1861 declaration by Tsar Alexander II that serfs were now legally free of their landlords. Until then, over a third of Russians were tied to the land on which they lived and worked and in practice there was little to distinguish their condition from slavery. Russia had lost the Crimean War in 1855 and there had been hundreds of uprisings, prompting the Tsar to tell the nobles, "The existing condition of owning souls cannot remain unchanged. It is better to begin to destroy serfdom from above than to wait until that time when it begins to destroy itself from below." Reform was constrained by the Tsar's wish to keep the nobles on side and, for the serfs, tied by debt and law to the little land they were then allotted, the benefits were hard to see. With Sarah Hudspith Associate Professor in Russian at the University of LeedsSimon Dixon The Sir Bernard Pares Professor of Russian History at UCLAndShane O'Rourke Senior Lecturer in History at the University of YorkProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the eleven stories of Celtic mythology and Arthurian romance known as The Mabinogion, most of which were told and retold for generations before being written down in C14th. Among them are stories of Pwyll and Rhiannon and their son Pryderi, of Culhwch and Olwen, of the dream of the Emperor Macsen, of Lludd and Llefelys, of magic and giants and imagined history. With common themes but no single author, they project an image of the Island of Britain before the Anglo-Saxons and Normans and before Edward I's conquest of Wales. They came to new prominence, worldwide, from C19th with the translation into English by Lady Charlotte Guest aided by William Owen Pughe.The image above is of Cynon ap Clydno approaching the Castle of Maidens from the tale of Owain, or the Lady of the FountainWith Sioned Davies Professor in the School of Welsh at Cardiff UniversityHelen Fulton Professor of Medieval Literature at the University of BristolAndJuliette Wood Associate Lecturer in the School of Welsh at Cardiff UniversityProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the Berber people who grew to dominate the western Maghreb, founded Marrakesh and took control of Al-Andalus. They were desert people, wearing veils over their faces to keep out the sand, and they wanted a simpler form of Islam. They called themselves the Murabitun, the people who gathered together to fight the holy war, and they were tough fighters; the Spanish knight El Cid fought them and lost, and the legend that built around him said the Almoravids were terrible and had to be resisted. They kept back the Christians of northern Spain, so helping extend Muslim rule in the Iberian Peninsula, before they themselves were destroyed and replaced by their rivals, the Almohads, from the Atlas Mountains.The image above shows the interior of the cupola, Almoravid Koubba, Marrakesh (C11th)With Amira K Bennison Professor in the History and Culture of the Maghreb at the University of CambridgeNicola Clarke Lecturer in the History of the Islamic World at Newcastle UniversityAnd Hugh Kennedy Professor of Arabic at SOAS, University of LondonProducer: Simon Tillotson.

Melvyn Bragg and guests discuss the discovery and growing understanding of the Proton, formed from three quarks close to the Big Bang and found in the nuclei of all elements. The positive charges they emit means they attract the fundamental particles of negatively charged electrons, an attraction that leads to the creation of atoms which in turn leads to chemistry, biology and life itself. The Sun (in common with other stars) is a fusion engine that turn protons by a series of processes into helium, emitting energy in the process, with about half of the Sun's protons captured so far. Hydrogen atoms, stripped of electrons, are single protons which can be accelerated to smash other nuclei and have applications in proton therapy. Many questions remain, such as why are electrical charges for protons and electrons so perfectly balanced?WithFrank Close Professor Emeritus of Physics at the University of OxfordHelen Heath Reader in Physics at the University of BristolAndSimon Jolly Lecturer in High Energy Physics at University College LondonProducer: Simon Tillotson.

Melvyn Bragg and guests discuss what Virginia Woolf called 'one of the few English novels written for grown-up people'. It was written by George Eliot, the pen name of Mary Anne Evans (1819-80), published in 8 parts in 1871-72, and was originally two separate stories which became woven together. One, 'Middlemarch', focused on a doctor, Tertius Lydgate and the other, 'Miss Brooke', on Dorothea Brooke who became the central figure in the finished work. The events are set in a small town in the Midlands, surrounded by farmland, leading up to the Reform Act 1832, and the novel explores the potential to change in matters of religion, social status, marriage and politics, and is particularly concerned with the opportunities available to women to lead fulfilling lives. The image above shows Rufus Sewell and Juliet Aubrey in the BBC adaptation, from 1994With Rosemary Ashton Emeritus Quain Professor of English Language and Literature at University College LondonKathryn Hughes Professor of Life Writing at the University of East AngliaAnd John Bowen Professor of Nineteenth-Century Literature at the University of YorkProducer: Simon Tillotson.

In a programme first broadcast on April 12th 2018, Melvyn Bragg and guests discuss the contribution of George Stephenson (1781-1848) and his son Robert (1803-59) to the development of the railways in C19th. George became known as The Father of Railways and yet arguably Robert's contribution was even greater, with his engineering work going far beyond their collaboration. Robert is credited with the main role in the design of their locomotives. George had worked on stationary colliery steam engines and, with Robert, developed the moving steam engine Locomotion No1 for the Stockton and Darlington Railway in 1825. They produced the Rocket for the Rainhill Trials on the Liverpool and Manchester Railway in 1829. From there, the success of their designs and engineering led to the expansion of railways across Britain and around the world. with Dr Michael Bailey Railway historian and editor of the most recent biography of Robert StephensonJulia Elton Past President of the Newcomen Society for the History of Engineering and TechnologyandColin Divall Professor Emeritus of Railway Studies at the University of YorkProducer: Simon Tillotson. This programme is a repeat

Melvyn Bragg and guests discuss the role of slavery in the Roman world, from its early conquests to the fall of the Western Empire. The system became so entrenched that no-one appeared to question it, following Aristotle's view that slavery was a natural state. Whole populations could be marched into slavery after military conquests, and the freedom that Roman citizens prized for themselves, even in poverty, was partly defined by how it contrasted with enslavement. Slaves could be killed or tortured with impunity, yet they could be given great responsibility and, once freed, use their contacts to earn fortunes. The relationship between slave and master informed early Christian ideas of how the faithful related to God, informing debate for centuries.WithNeville Morley Professor of Classics and Ancient History at the University of ExeterUlrike Roth Senior Lecturer in Ancient History at the University of EdinburghAndMyles Lavan Senior lecturer in Ancient History at the University of St AndrewsProducer: Simon Tillotson.

Melvyn Bragg and guests discuss Alexis de Tocqueville (1805-1859) and his examination of the American democratic system. He wrote De La Démocratie en Amérique in two parts, published in 1835 and 1840, when France was ruled by the July Monarchy of Louis-Philippe. Tocqueville was interested in how aspects of American democracy, in the age of President Andrew Jackson, could be applied to Europe as it moved away from rule by monarchs and aristocrats. His work has been revisited by politicians ever since, particularly in America, with its analysis of the strengths and weaknesses of direct democracy and its warnings of mediocrity and the tyranny of the majority.WithRobert Gildea Professor of Modern History at the University of OxfordSusan-Mary Grant Professor of American History at Newcastle Universityand Jeremy Jennings Professor of Political Theory and Head of the School of Politics & Economics at King's College LondonProducer: Simon Tillotson.