In Our Time

Melvyn Bragg and his guests discuss the Putney Debates. For several weeks in late 1647, after the defeat of King Charles I in the first hostilities of the Civil War, representatives of the New Model Army and the radical Levellers met in a church in Putney to debate the future of England. There was much to discuss: who should be allowed to vote, civil liberties and religious freedom. The debates were inconclusive, but the ideas aired in Putney had a considerable influence on centuries of political thought.With:Justin Champion Professor of the History of Early Modern Ideas at Royal Holloway, University of LondonAnn Hughes Professor of Early Modern History at Keele UniversityKate Peters Fellow in History at Murray Edwards College, Cambridge.Producer: Thomas Morris.

Melvyn Bragg and his guests discuss the Amazons, a tribe of formidable female warriors first described in Greek literature. They appear in the Homeric epics and were described by Herodotus, and featured prominently in the decoration of Greek vases and public buildings. In later centuries, particularly in the Renaissance, the Amazons became a popular theme of literature and art. After the discovery of the New World, the largest river in South America was named the Amazon, since the warlike tribes inhabiting the river's margins reminded Spanish pioneers of the warriors of classical myth.With:Paul Cartledge A.G. Leventis Professor of Greek Culture at Cambridge UniversityChiara Franceschini Teaching Fellow at University College London and an Academic Assistant at the Warburg InstituteCaroline Vout University Senior Lecturer in Classics and Fellow and Director of Studies at Christ's College, Cambridge.Producer: Thomas Morris.

Melvyn Bragg and his guests discuss Japan's Sakoku period, two centuries when the country deliberately isolated itself from the Western world. Sakoku began with a series of edicts in the 1630s which restricted the rights of Japanese to leave their country and expelled most of the Europeans living there. For the next two hundred years, Dutch traders were the only Westerners free to live in Japan. It was not until 1858 and the gunboat diplomacy of the American Commodore Matthew Perry that Japan's international isolation finally ended. Although historians used to think of Japan as completely isolated from external influence during this period, recent scholarship suggests that Japanese society was far less isolated from European ideas during this period than previously thought.With:Richard Bowring Emeritus Professor of Japanese Studies at the University of CambridgeAndrew Cobbing Associate Professor of History at the University of NottinghamRebekah Clements Research Fellow of Queens' College and Research Associate at the Faculty of Asian and Middle Eastern Studies at the University of Cambridge.Producer: Thomas Morris.

Melvyn Bragg and his guests discuss one of the simplest and most remarkable of all molecules: water. Water is among the most abundant substances on Earth, covering more than two-thirds of the planet. Consisting of just three atoms, the water molecule is superficially simple in its structure but extraordinary in its properties. It is a rare example of a substance that can be found on Earth in gaseous, liquid and solid forms, and thanks to its unique chemical behaviour is the basis of all known life. Scientists are still discovering new things about it, such as the fact that there are at least fifteen different forms of ice.Hasok Chang Hans Rausing Professor of History and Philosophy of Science at the University of CambridgeAndrea Sella Professor of Chemistry at University College LondonPatricia Hunt Senior Lecturer in Chemistry at Imperial College London.Producer: Thomas Morris.

Melvyn Bragg and his guests discuss the work of Alfred Russel Wallace, a pioneer of evolutionary theory. Born in 1823, Wallace travelled extensively, charting the distribution of animal species throughout the world. This fieldwork in the Amazon and later the Malay Archipelago led him to formulate a theory of evolution through natural selection. In 1858 he sent the paper he wrote on the subject to Charles Darwin, who was spurred into the writing and publication of his own masterpiece On the Origin of Species. Wallace was also the founder of the science of biogeography and made important discoveries about the nature of animal coloration. But despite his visionary work, Wallace has been overshadowed by the greater fame of his contemporary Darwin.With:Steve Jones Emeritus Professor of Genetics at University College LondonGeorge Beccaloni Curator of Cockroaches and Related Insects and Director of the Wallace Correspondence Project at the Natural History MuseumTed Benton Professor of Sociology at the University of EssexProducer: Thomas Morris.

Melvyn Bragg and his guests discuss the life and work of Anton Chekhov. Born in 1860, Chekhov trained as a doctor and for most of his adult life divided his time between medicine and writing. Best known for plays including The Cherry Orchard and Three Sisters, he is also celebrated today as one of the greatest of short story writers. His works are often powerful character studies and chronicle the changing nature of Russian society in the late nineteenth century.With:Catriona Kelly Professor of Russian at the University of OxfordCynthia Marsh Emeritus Professor of Russian Drama and Literature at the University of NottinghamRosamund Bartlett Founding Director of the Anton Chekhov Foundation and former Reader in Russian at the University of Durham.Producer: Thomas Morris.

In a programme first broadcast in 2013, Melvyn Bragg and his guests discuss absolute zero, the lowest conceivable temperature. In the early eighteenth century the French physicist Guillaume Amontons suggested that temperature had a lower limit. The subject of low temperature became a fertile field of research in the nineteenth century, and today we know that this limit - known as absolute zero - is approximately minus 273 degrees Celsius. It is impossible to produce a temperature exactly equal to absolute zero, but today scientists have come to within a billionth of a degree. At such low temperatures physicists have discovered a number of strange new phenomena including superfluids, liquids capable of climbing a vertical surface.With:Simon Schaffer Professor of the History of Science at the University of CambridgeStephen Blundell Professor of Physics at the University of OxfordNicola Wilkin Lecturer in Theoretical Physics at the University of BirminghamProducer: Thomas Morris

Melvyn Bragg and his guests discuss the life and work of the Victorian anthropologist and archaeologist Augustus Pitt-Rivers. Over many years he amassed thousands of ethnographic and archaeological objects, some of which formed the founding collection of the Pitt Rivers Museum at Oxford University. Inspired by the work of Charles Darwin, Pitt-Rivers believed that human technology evolved in the same way as living organisms, and devoted much of his life to exploring this theory. He was also a pioneering archaeologist whose meticulous records of major excavations provided a model for later scholars. With:Adam Kuper Visiting Professor of Anthropology at Boston UniversityRichard Bradley Professor in Archaeology at the University of ReadingDan Hicks University Lecturer & Curator of Archaeology at the Pitt Rivers Museum at the University of Oxford.Producer: Thomas Morris.

David Bradshaw, John Bowen and Ann Pasternak Slater join Melvyn Bragg to discuss Evelyn Waugh's comic novel Decline and Fall. Set partly in a substandard boys' public school, the novel is a vivid, often riotous portrait of 1920s Britain. Its themes, including modernity, religion and fashionable society, came to dominate Waugh's later fiction, but its savage wit and economy of style were entirely new. Published when Waugh was 24, the book was immediately celebrated for its vicious satire and biting humour.With:David Bradshaw Professor of English Literature at Worcester College, OxfordJohn Bowen Professor of Nineteenth-Century Literature at the University of YorkAnn Pasternak Slater Senior Research Fellow at St Anne's College, Oxford.Producer: Thomas Morris.

Jane Francis, Richard Corfield and Carrie Lear join Melvyn Bragg to discuss ice ages, periods when a reduction in the surface temperature of the Earth has resulted in ice sheets at the Poles. Although the term 'ice age' is commonly associated with prehistoric eras when much of northern Europe was covered in ice, we are in fact currently in an ice age which began up to 40 million years ago. Geological evidence indicates that there have been several in the Earth's history, although their precise cause is not known. Ice ages have had profound effects on the geography and biology of our planet.With:Jane Francis Professor of Paleoclimatology at the University of LeedsRichard Corfield Visiting Research Fellow in the Department of Earth Sciences at Oxford UniversityCarrie Lear Senior Lecturer in Palaeoceanography at Cardiff University.Producer: Thomas Morris.

Angie Hobbs, David Sedley and James Warren join Melvyn Bragg to discuss Epicureanism, the system of philosophy based on the teachings of Epicurus and founded in Athens in the fourth century BC. Epicurus outlined a comprehensive philosophical system based on the idea that everything in the Universe is constructed from two phenomena: atoms and void. At the centre of his philosophy is the idea that the goal of human life is pleasure, by which he meant not luxury but the avoidance of pain. His followers were suspicious of marriage and politics but placed great emphasis on friendship. Epicureanism became influential in the Roman world, particularly through Lucretius's great poem De Rerum Natura, which was rediscovered and widely admired in the Renaissance.With:Angie Hobbs Professor of the Public Understanding of Philosophy at the University of SheffieldDavid Sedley Laurence Professor of Ancient Philosophy at the University of CambridgeJames Warren Reader in Ancient Philosophy at the University of CambridgeProducer: Thomas Morris.

Melvyn Bragg and his guests discuss the War of 1812, the conflict between America and the British Empire sometimes referred to as the second American War of Independence. In June 1812, President James Madison declared war on Britain, angered by the restrictions Britain had imposed on American trade, the Royal Navy's capture of American sailors and British support for Native Americans. After three years of largely inconclusive fighting, the conflict finally came to an end with the Treaty of Ghent which, among other things, helped to hasten the abolition of the global slave trade. Although the War of 1812 is often overlooked, historians say it had a profound effect on the USA and Canada's sense of national identity, confirming the USA as an independent country. America's national anthem, The Star-Spangled Banner began life as a poem written after its author, Francis Scott Key, witnessed the British bombardment of Fort McHenry during the Battle of Baltimore. The war also led to Native Americans losing hundreds of thousands of acres of land in a programme of forced removal. With: Kathleen Burk Professor of Modern and Contemporary History at University College London Lawrence Goldman Fellow in Modern History at St Peter's College, University of Oxford Frank Cogliano Professor of American History at the University of Edinburgh Producer: Victoria Brignell.

Melvyn Bragg and his guests discuss Romulus and Remus, the central figures of the foundation myth of Rome. According to tradition, the twins were abandoned by their parents as babies, but were saved by a she-wolf who found and nursed them. Romulus killed his brother after a vicious quarrel, and went on to found a city, which was named after him.The myth has been at the core of Roman identity since the 1st century AD, although the details vary in different versions of the story. For many Roman writers, the story embodied the ethos and institutions of their civilisation. The image of the she-wolf suckling the divinely fathered twins remains a potent icon of the city even today.With:Mary Beard Professor of Classics at the University of Cambridge Peter Wiseman Emeritus Professor of Classics and Ancient History at the University of Exeter Tim Cornell Emeritus Professor of Ancient History at the University of Manchester.Producer: Thomas Morris.

Melvyn Bragg and his guests discuss comets, the 'dirty snowballs' of the Solar System. In the early 18th century the Astronomer Royal Sir Edmond Halley compiled a list of appearances of comets, bright objects like stars with long tails which are occasionally visible in the night sky. He concluded that many of these apparitions were in fact the same comet, which returns to our skies around every 75 years, and whose reappearance he correctly predicted. Halley's Comet is today the best known example of a comet, a body of ice and dust which orbits the Sun. Since they contain materials from the time when the Solar System was formed, comets are regarded by scientists as frozen time capsules, with the potential to reveal important information about the early history of our planet and others.With:Monica Grady Professor of Planetary and Space Sciences at the Open UniversityPaul Murdin Senior Fellow at the Institute of Astronomy at the University of CambridgeDon Pollacco Professor of Astronomy at the University of WarwickProducer: Thomas Morris.

Melvyn Bragg and his guests discuss Thomas Malory's "Le Morte Darthur", the epic tale of King Arthur and his knights of the Round Table. Sir Thomas Malory was a knight from Warwickshire, a respectable country gentleman and MP in the 1440s who later turned to a life of crime and spent various spells in prison. It was during Malory's final incarceration that he wrote "Le Morte Darthur", an epic work which was based primarily on French, but also some English, sources. Malory died shortly after his release in 1470 and it was to be another fifteen years before "Le Morte Darthur" was published by William Caxton, to immediate popular acclaim. Although the book fell from favour in the seventeenth century, it was revived again in Victorian times and became an inspiration for the Pre-Raphaelite movement who were entranced by the chivalric and romantic world that Malory portrayed. The Arthurian legend is one of the most enduring and popular in western literature and its characters - Sir Lancelot, Guinevere, Merlin and King Arthur himself, are as well-known today as they were then; and the book's themes - chivalry, betrayal, love and honour - remain as compelling.With: Helen Cooper Professor of Medieval and Renaissance English at the University of CambridgeHelen Fulton Professor of Medieval Literature and Head of Department of English and Related Literature at the University of YorkLaura Ashe CUF Lecturer and Tutorial Fellow at Worcester College at the University of OxfordProducer: Natalia Fernandez.

Melvyn Bragg and his guests discuss the cult of Mithras, a mystery religion that existed in the Roman Empire from the 1st to the 4th centuries AD. Also known as the Mysteries of Mithras, its origins are uncertain. Academics have suggested a link with the ancient Vedic god Mitra and the Iranian Zoroastrian deity Mithra, but the extent and nature of the connection is a matter of controversy. Followers of Mithras are thought to have taken part in various rituals, most notably communal meals and a complex seven-stage initiation system. Typical depictions of Mithras show him being born from a rock, enjoying food with the sun god Sol and stabbing a bull. Mithraic places of worship have been found throughout the Roman world, including an impressive example in London. However, Mithraism went into decline in the 4th century AD with the rise of Christianity and eventually completely disappeared. In recent decades, many aspects of the cult have provoked debate, especially as there are no written accounts by its members. As a result, archaeology has been of great importance in the study of Mithraism and has provided new insights into the religion and its adherents. With:Greg Woolf Professor of Ancient History at the University of St AndrewsAlmut Hintze Zartoshty Professor of Zoroastrianism at SOAS, University of LondonJohn North Acting Director of the Institute of Classical Studies, University of London.Producer: Victoria Brignell.

Melvyn Bragg and his guests discuss The South Sea Bubble, the speculation mania in early 18th-century England which ended in the financial ruin of many of its investors. The South Sea Company was founded in 1711 with a view to restructuring government debt and restoring public credit. The company would ostensibly trade with South America, hence its name; and indeed, it did trade in slaves for the Spanish market even after the Bubble burst in 1720. People from all walks of life bought shares in the South Sea Company, from servants to gentry, and it was said the entire country was gripped by South Sea speculation mania. When the shares crashed and the company collapsed there was a public outcry and many people faced financial ruin, although some investors sold before the crash and made substantial amounts of money. For example, the bookseller Thomas Guy made his fortune and founded a hospital in his name the following year. But how did such a financial crisis develop and were there any lessons learnt following this early example of a stock market boom and bust?With:Anne Murphy Senior Lecturer in History at the University of HertfordshireHelen Paul Lecturer in Economics and Economic History at the University of SouthamptonRoey Sweet Head of the School of History at the University of LeicesterProducer: Natalia Fernandez.

Melvyn Bragg and his guests discuss the epic poem the Shahnameh of Ferdowsi, the 'Book of Kings', which has been at the heart of Persian culture for the past thousand years. The poem recounts a legendary history of Iran from the dawn of time to the fall of the Persian Empire in the 7th century and serves, in a sense, as a creation myth for the Persian nation. The Shahnameh took Ferdowsi thirty years to write and, consisting of over 50,000 verses, is said to be the longest poem ever written by a single author. Laced with tragedy, Ferdowsi's epic chronicles battles, romances, family rifts and Man's interior struggle with himself. Although the stories may not always be true they have a profound resonance with Iranians even today, and the poem has been referred to as both the 'encyclopaedia of Iranian culture' and the identity card of the Persian people. With:Narguess Farzad Senior Fellow in Persian at SOAS, University of LondonCharles Melville Professor of Persian History at Pembroke College at the University of CambridgeVesta Sarkhosh Curtis Curator of Middle Eastern Coins at the British Museum Producer: Natalia Fernandez.

Melvyn Bragg and his guests discuss the influential British philosopher Bertrand Russell. Born in 1872 into an aristocratic family, Russell is widely regarded as one of the founders of Analytic philosophy, which is today the dominant philosophical tradition in the English-speaking world. In his important book The Principles of Mathematics, he sought to reduce mathematics to logic. Its revolutionary ideas include Russell's Paradox, a problem which inspired Ludwig Wittgenstein to pursue philosophy. Russell's most significant and famous idea, the theory of descriptions, had profound consequences for the discipline.In addition to his academic work, Russell played an active role in many social and political campaigns. He supported women's suffrage, was imprisoned for his pacifism during World War I and was a founder of the Campaign for Nuclear Disarmament. He wrote a number of books aimed at the general public, including The History of Western Philosophy which became enormously popular, and in 1950 he was awarded the Nobel Prize in Literature. Russell's many appearances on the BBC also helped to promote the public understanding of ideas.With: AC Grayling Master of the New College of the Humanities and a Supernumerary Fellow of St Anne's College, OxfordMike Beaney Professor of Philosophy at the University of York Hilary Greaves Lecturer in Philosophy and Fellow of Somerville College, Oxford Producer: Victoria Brignell.

Melvyn Bragg and his guests discuss the history of crystallography, the study of crystals and their structure. The discovery in the early 20th century that X-rays could be diffracted by a crystal revolutionised our knowledge of materials. This crystal technology has touched most people's lives, thanks to the vital role it plays in diverse scientific disciplines - from physics and chemistry, to molecular biology and mineralogy. To date, 28 Nobel Prizes have been awarded to scientists working with X-ray crystallography, an indication of its crucial importance. The history of crystallography began with the work of Johannes Kepler in the 17th century, but perhaps the most crucial leap in understanding came with the work of the father-and-son team the Braggs in 1912. They built on the work of the German physicist Max von Laue who had proved that X-rays are a form of light waves and that it was possible to scatter these rays using a crystal. The Braggs undertook seminal experiments which transformed our perception of crystals and their atomic arrangements, and led to some of the most significant scientific findings of the last century - such as revealing the structure of DNA. With:Judith Howard Director of the Biophysical Sciences Institute and Professor of Chemistry at the University of DurhamChris Hammond Life Fellow in Material Science at the University of LeedsMike Glazer Emeritus Professor of Physics at the University of Oxford and Visiting Professor of Physics at the University of WarwickProducer: Natalia Fernandez.

Melvyn Bragg and his guests discuss the Borgias, the most notorious family in Renaissance Italy. Famed for their treachery and corruption, the Borgias produced two popes during their time of dominance in Rome in the late 15th century. The most well-known of these two popes is Alexander VI, previously Cardinal Rodrigo Borgia. He was accused of buying votes to elect him to the papacy and openly promoted his children in positions of power. Rodrigo's daughter, Lucrezia, is widely remembered as a ruthless poisoner; his son, Cesare, as a brutal soldier. Murder, intrigue and power politics characterised their rule, but many of the stories now told about their depraved behaviour and evil ways emerged after their demise and gave rise to the so-called 'Black Legend'. The sullied reputation of the Borgia dynasty endures even today and their lives have provided a major theme for plays, novels and over forty films.With:Evelyn Welch Professor of Renaissance Studies at Queen Mary, University of LondonCatherine Fletcher Lecturer in Public History at the University of SheffieldChristine Shaw Honorary Research Fellow at Swansea University Producer: Natalia Fernandez.

Melvyn Bragg and his guests discuss the French philosopher and social activist Simone Weil. Born in Paris in 1909 into a wealthy, agnostic Jewish family, Weil was a precocious child and attended the prestigious Ecole Normale Superieure in Paris, achieving the top marks in her class (Simone de Beauvoir came second). Weil rejected her comfortable background and chose to work in fields and factories to experience the life of the working classes at first hand. She was acutely sensitive to human suffering and devoted her life to helping those less fortunate than herself. Despite her belief in pacifism she volunteered on the Republican side during the Spanish Civil War and later joined the French Resistance movement in England. Her philosophy was both complex and intense. She argued that the presence of evil and suffering in the world was evidence of God's love and that Man has no right to ask anything of God or of anyone whom they love. Love which expects reward was not love at all in Weil's eyes. Weil died of TB in Kent at the age of only 34. Her strict lifestyle and self-denial may have contributed to her early death. T.S Eliot said "she was not just a woman of genius, but was a genius akin to that of a saint"; Albert Camus believed she was "the only great spirit of our time." With:Beatrice Han-Pile Professor of Philosophy at the University of EssexStephen Plant Runcie Fellow and Dean of Trinity Hall at the University of CambridgeDavid Levy Teaching Fellow in the Department of Philosophy at the University of EdinburghProducer: Natalia Fernandez.

Melvyn Bragg and his guests discuss the Upanishads, the ancient sacred texts of Hinduism. Dating from about 700 BC, the Upanishads were passed down through an oral tradition in priestly castes and were not written down until the 6th century AD. They constitute the final part of the Vedas, the collection of texts which form the foundation of the Indian Hindu world, and were originally spoken during sacrificial rituals.Yet the Upanishads go beyond incantations performed during sacrifices, and ask profound questions about human existence and man's place in the cosmos. The concepts of Brahman (the universal cosmic power) and Atman (the deeper soul of the individual) are central to the understanding of the Upanishads. Each individual treatise has its own character. Some are poetic; some are scientific; others are dialogues between kings and sages or metaphysical reflections. More than one hundred Upanishads were produced, thirteen of which are regarded as the canonical scriptures of Hinduism.With:Jessica Frazier Lecturer in Religious Studies at the University of Kent and a Research Fellow at the Oxford Centre for Hindu Studies at the University of OxfordChakravarthi Ram-Prasad Professor of Comparative Religion and Philosophy at Lancaster UniversitySimon Brodbeck Lecturer in Religious Studies at the University of CardiffProducer: Natalia Fernandez.

Melvyn Bragg and his guests discuss The Anarchy, the civil war that took place in mid-twelfth century England. The war began as a succession dispute between the Empress Matilda, daughter of Henry I, and her cousin, Stephen of Blois. On Henry's death Stephen seized the English throne and held it for a number of years before Matilda wrestled it from him, although she was chased out of London before she could be crowned. The Anarchy dragged on for nearly twenty years and is so called because of the chaos and lawlessness that characterised the period. Yet only one major battle ever took place, the Battle of Lincoln in 1141, and any other fighting associated with the conflict was fairly localised. This has led historians to question the accuracy of labelling the civil war as The Anarchy, a name only bestowed on the era in the 19th century. But why did Matilda fail to become the monarch, and what impact did it have on the way England was ruled in centuries to come?With: John Gillingham Emeritus Professor of History at the London School of Economics and Political ScienceLouise Wilkinson Reader in Medieval History at Canterbury Christ Church UniversityDavid Carpenter Professor of Medieval History at Kings College London. Producer: Natalia Fernandez.

Melvyn Bragg and his guests discuss Fermat's Last Theorem. In 1637 the French mathematician Pierre de Fermat scribbled a note in the margin of one of his books. He claimed to have proved a remarkable property of numbers, but gave no clue as to how he'd gone about it. "I have found a wonderful demonstration of this proposition," he wrote, "which this margin is too narrow to contain". Fermat's theorem became one of the most iconic problems in mathematics and for centuries mathematicians struggled in vain to work out what his proof had been. In the 19th century the French Academy of Sciences twice offered prize money and a gold medal to the person who could discover Fermat's proof; but it was not until 1995 that the puzzle was finally solved by the British mathematician Andrew Wiles. With:Marcus du Sautoy Professor of Mathematics & Simonyi Professor for the Public Understanding of Science at the University of OxfordVicky Neale Fellow and Director of Studies in Mathematics at Murray Edwards College at the University of CambridgeSamir Siksek Professor at the Mathematics Institute at the University of Warwick.Producer: Natalia Fernandez.

Melvyn Bragg and his guests discuss the life and influence of William Caxton, the merchant who brought the printing press to the British Isles. After spending several years working as a printer in Bruges, Caxton returned to London and in 1476 set up his first printing press in Westminster, and also imported and sold other printed books. Caxton concentrated on producing popular books that he knew would sell, such as Chaucer's 'Canterbury Tales' and small liturgical 'books of hours'. The standard of Caxton's printing may have lagged behind that on the continent, but he was a skilful businessman and unusually for printers at the time, he managed not to go bankrupt. The advent of print is now seen as one of the great revolutions in intellectual history - although many scholars believe it was a revolution that took many generations to have an effect.With:Richard Gameson Professor of the History of the Book at the University of DurhamJulia Boffey Professor of Medieval Studies in the English Department at Queen Mary, University of LondonDavid Rundle Member of the History Faculty at the University of OxfordProducer: Natalia Fernandez.

Melvyn Bragg and his guests discuss the life and achievements of Hannibal. One of the most celebrated military leaders in history, Hannibal was the Carthaginian general who led an entire army, complete with elephants, across the Alps in order to attack the Roman Republic. He lived at a time of prolonged hostility between the two great Mediterranean powers, Rome and Carthage, and was the Carthaginians' inspirational leader during the Second Punic War which unfolded between 218 and 202 BC. His career ended in defeat and exile, but he achieved such fame that even his enemies the Romans erected statues of him. Centuries later his tactical genius was admired and studied by generals including Napoleon and Wellington.With:Ellen O'Gorman Senior Lecturer in Classics at the University of BristolMark Woolmer Senior Tutor in the Department of Classics and Ancient History at the University of DurhamLouis Rawlings Senior Lecturer in Ancient History at Cardiff University.Producer: Natalia Fernandez.

Melvyn Bragg and his guests discuss the medieval scholar Gerald of Wales. Born around the middle of the twelfth century, Gerald was a cleric and courtier. For much of his life he was close to Henry II and the Church hierarchy, and wrote accounts of official journeys he made around Wales and Ireland in their service. Both Anglo-Norman and Welsh by parentage, he had a unique perspective on the political strife of his age. Gerald's Journey Around Wales and Description of Ireland are among the most colourful and informative chronicles of the Middle Ages, and had a powerful influence on later historians.With:Henrietta Leyser Emeritus Fellow of St Peter's College, University of OxfordMichelle Brown Professor Emerita of Medieval Manuscript Studies at the School of Advanced Study, University of LondonHuw Pryce Professor of Welsh History at Bangor UniversityProducer: Thomas Morris.

Melvyn Bragg and his guests discuss the Ontological Argument. In the eleventh century St Anselm of Canterbury proposed that it was possible to prove the existence of God using reason alone. His argument was ridiculed by some of his contemporaries, but was analysed and improved by later thinkers including Descartes, Spinoza and Leibniz. Other philosophers have been less kind, with the Enlightenment thinker David Hume offering one possible refutation. But the debate continued, fuelled by interventions from such heavyweights as Immanuel Kant and Kurt Gödel; and it remains one of the most discussed problems in philosophy.With:John Haldane Professor of Philosophy at the University of St AndrewsPeter Millican Professor of Philosophy at the University of OxfordClare Carlisle Lecturer in Philosophy of Religion at King's College LondonProducer: Thomas Morris.

Melvyn Bragg and his guests discuss the Druids, the priests of ancient Europe. Active in Ireland, Britain and Gaul, the Druids were first written about by Roman authors including Julius Caesar and Pliny, who described them as wearing white robes and cutting mistletoe with golden sickles. They were suspected of leading resistance to the Romans, a fact which eventually led to their eradication from ancient Britain. In the early modern era, however, interest in the Druids revived, and later writers reinvented and romanticised their activities. Little is known for certain about their rituals and beliefs, but modern archaeological discoveries have shed new light on them.With:Barry Cunliffe Emeritus Professor of Archaeology at the University of OxfordMiranda Aldhouse-Green Professor of Archaeology at Cardiff UniversityJustin Champion Professor of the History of Early Modern Ideas at Royal Holloway, University of LondonProducer: Thomas Morris.

Melvyn Bragg and his guests discuss the cell, the fundamental building block of life. First observed by Robert Hooke in 1665, cells occur in nature in a bewildering variety of forms. Every organism alive today consists of one or more cells: a single human body contains up to a hundred trillion of them. The first life on Earth was a single-celled organism which is thought to have appeared around three and a half billion years ago. That simple cell resembled today's bacteria. But eventually these microscopic entities evolved into something far more complex, and single-celled life gave rise to much larger, complex multicellular organisms. But how did the first cell appear, and how did that prototype evolve into the sophisticated, highly specialised cells of the human body?With:Steve Jones Professor of Genetics at University College LondonNick Lane Senior Lecturer in the Department of Genetics, Evolution and Environment, University College LondonCathie Martin Group Leader at the John Innes Centre and Professor in the School of Biological Sciences at the University of East AngliaProducer: Thomas Morris.

Melvyn Bragg and his guests discuss Hadrian's Wall, the largest Roman structure and one of the most important archaeological monuments in Britain. Stretching for eighty miles from the mouth of the River Tyne to the Solway Firth and classified today as a World Heritage Site, it has been a source of fascination ever since it came into existence. It was built in about 122 AD by the Emperor Hadrian, and a substantial part of it still survives today. Although its construction must have entailed huge cost and labour, the Romans abandoned it within twenty years, deciding to build the Antonine Wall further north instead. Even after more than a century of excavations, many mysteries still surround Hadrian's Wall, including its exact purpose. Did it have a meaningful defensive role or was it mainly a powerful emperor's vanity project? With: Greg Woolf Professor of Ancient History at the University of St AndrewsDavid Breeze Former Chief Inspector of Ancient Monuments for Scotland and Visiting Professor of Archaeology at the University of DurhamLindsay Allason-Jones Former Reader in Roman Material Culture at the University of NewcastleProducer: Victoria Brignell.

Melvyn Bragg and his guests discuss Scepticism, the idea that it may be impossible to know anything with complete certainty. Scepticism was first outlined by ancient Greek philosophers: Socrates is reported to have said that the only thing he knew for certain was that he knew nothing. Later, Scepticism was taught at the Academy founded by Plato, and learnt by students who included the Roman statesman Cicero. The central ideas of Scepticism were taken up by later philosophers and came to the fore during the Renaissance, when thinkers including Rene Descartes and Michel de Montaigne took up its challenge. A central plank of the philosophical system of David Hume, Scepticism had a powerful influence on the religious and scientific debates of the Enlightenment.With:Peter Millican Professor of Philosophy at Hertford College, OxfordMelissa Lane Professor of Politics at Princeton UniversityJill Kraye Professor of the History of Renaissance Philosophy and Librarian at the Warburg Institute, University of London. Producer: Thomas Morris.

Melvyn Bragg and his guests discuss the life and work of the Arab philosopher al-Kindi. Born in the early ninth century, al-Kindi was heavily influenced by Greek philosophy and supervised the translation of many works by Aristotle and others into Arabic. The author of more than 250 works, he wrote on many different subjects, from optics to mathematics, music and astrology. He was the first significant thinker to argue that philosophy and Islam had much to offer each other and need not be kept apart. Today al-Kindi is regarded as one of the greatest scholars of the medieval Islamic world.With:Hugh Kennedy Professor of Arabic at SOAS, University of LondonJames Montgomery Sir Thomas Adams's Professor of Arabic Elect at the University of CambridgeAmira Bennison Senior Lecturer in Middle Eastern and Islamic Studies at the University of Cambridge.Producer: Thomas Morris.

Melvyn Bragg and his guests discuss the life of the prominent 19th-century social reformer Annie Besant. Born in 1847, Annie Besant espoused a range of causes including secularism, women's rights, Socialism, Irish Home Rule, birth control and better conditions for workers. Described by Beatrice Webb as having "the voice of a beautiful soul", Besant became an eloquent public speaker as well as writing numerous campaigning articles and pamphlets. She is perhaps most famous for the key role she played in the successful strike by female workers at the Bryant and May match factory in East London in 1888, which brought the appalling working conditions of many factory workers to greater public attention. Later in life she became a follower of theosophy, a belief system bringing together elements of Hinduism, Buddhism and other Eastern religions. She moved to India, its main base, and took on a leading role in the Indian self-rule movement, being appointed the first female president of the Indian National Congress in 1917. With: Lawrence Goldman Fellow in Modern History at St Peter's College, University of OxfordDavid Stack Reader in History at the University of Reading Yasmin Khan Senior Lecturer in Politics and International Relations at Royal Holloway, University of London. Producer: Victoria Brignell.

Melvyn Bragg and his guests discuss James Joyce's novel Ulysses. First published ninety years ago in Paris, Joyce's masterpiece is a sprawling and startlingly original work charting a single day in the life of the Dubliner Leopold Bloom. Some early readers were outraged by its sexual content and daringly scatalogical humour, and the novel was banned in most English-speaking countries for a decade after it first appeared. But it was soon recognised as a genuinely innovative work: overturning the ban on its publication, an American judge described Ulysses as "a sincere and serious attempt to devise a new literary method for the observation and description of mankind."Today Ulysses is widely regarded as the greatest example of literary modernism, and a work that changed literature forever. It remains one of the most discussed novels ever written.Steven ConnorProfessor of Modern Literature and Theory at Birkbeck, University of LondonJeri JohnsonSenior Fellow in English at Exeter College, OxfordRichard BrownReader in Modern English Literature at the University of LeedsProducer: Thomas Morris.

Melvyn Bragg and his guests discuss the biblical king Solomon, celebrated for his wisdom and as the architect of the First Temple in Jerusalem. According to the Old Testament account of his life, Solomon was chosen as his father David's successor as Israelite king, and instead of praying for long life or wealth asked God for wisdom. In the words of the Authorised Version, "And there came of all people to hear the wisdom of Solomon, from all kings of the earth, which had heard of his wisdom." Solomon is an important figure in Judaism, Islam and Christianity alike, and is also credited with the authorship of several scriptural texts. His name is associated with the tradition of wisdom literature and with a large number of myths and legends. For many centuries Solomon was seen as the archetypal enlightened monarch, and his example influenced notions of kingship from the Middle Ages onwards.With:Martin PalmerDirector of the International Consultancy on Religion, Education, and CulturePhilip AlexanderEmeritus Professor of Jewish Studies at the University of ManchesterKatharine DellSenior Lecturer in Old Testament Studies at the University of Cambridge, and Fellow of St Catherine's College, CambridgeProducer: Thomas Morris.

Melvyn Bragg and his guests discuss the Trojan War, one of the best known events of Greek mythology. According to the traditional version of the story, the war began when a Trojan prince, Paris, eloped with the Spartan queen Helen. A Greek army besieged Troy for ten years before the city was finally overrun and destroyed. Some of the most familiar names of Greek mythology are associated with the war, including Achilles and Hector, Odysseus and Helen of Troy - and it has also given us the story of the Trojan Horse.The war is the backdrop for Homer's epic poem The Iliad, and features in many other works from classical antiquity. For centuries it was assumed to be a mythical event. But in the nineteenth century a series of archaeological discoveries provided startling evidence that Troy might really have existed, leading some scholars to conclude that there could even be some truth behind the myth. So does the Trojan War story have any basis in fact? And why has it proved such an enduring legend?With:Edith HallProfessor of Classics at King's College LondonEllen AdamsLecturer in Classical Art and Archaeology at King's College LondonSusan SherrattLecturer in Archaeology at the University of SheffieldProducer: Thomas Morris.

Melvyn Bragg and his guests discuss the celebrated Venetian explorer Marco Polo. In 1271 Polo set off on an epic journey through Asia. He was away for more than twenty years, and when he returned to Venice he told extraordinary tales of his adventures. He had visited the court of the Mongol Emperor Kublai Khan, and acted as his emissary, travelling through many of the remote territories of the Far East. An account of Marco Polo's travels was written down by his contemporary Rustichello da Pisa, a romance writer he met after being imprisoned during a war against the neighbouring Genoese.The Travels of Marco Polo was one of the most popular books produced in the age before printing. It was widely translated, and many beautifully illustrated editions made their way to the collections of the rich and educated. It was much read by later travellers, and Polo's devotees included Christopher Columbus and Henry the Navigator. For centuries it was seen as the first and best account of life in the mysterious East; but today the accuracy and even truth of Marco Polo's work is often disputed.With:Frances WoodLead Curator of Chinese Collections at the British LibraryJoan Pau RubiesReader in International History at the London School of Economics and Political ScienceDebra Higgs StricklandSenior Lecturer in the History of Art at the University of GlasgowProducer: Thomas Morris.

Melvyn Bragg and his guests discuss On War, a treatise on the theory and practice of warfare written by the Prussian soldier and intellectual Carl von Clausewitz. First published in 1832, Clausewitz's magnum opus is commonly regarded as the most important book about military theory ever written. Informed by its author's experience of fighting against the mighty armies of Napoleon, the work looks not just at the practicalities of warfare, but offers a subtle philosophical analysis of the nature of war and its relationship with politics. Notions such as the Clausewitzian Trinity have had an enormous effect on later military leaders. But its influence is felt today not just on the battlefield but also in politics and business.With:Saul DavidProfessor of War Studies at the University of BuckinghamHew StrachanChichele Professor of the History of War at the University of OxfordBeatrice HeuserProfessor of International Relations at the University of Reading.Producer: Thomas Morris.

Melvyn Bragg and his guests discuss game theory, the mathematical study of decision-making. First formulated in the 1940s, the discipline entails devising 'games' to simulate situations of conflict or cooperation. It allows researchers to unravel decision-making strategies, and even to establish why certain types of behaviour emerge. Some of the games studied in game theory have become well known outside academia - they include the Prisoner's Dilemma, an intriguing scenario popularised in novels and films, and which has inspired television game shows. Today game theory is seen as a vital tool in such diverse fields as evolutionary biology, economics, computing and philosophy. With:Ian StewartEmeritus Professor of Mathematics at the University of WarwickAndrew ColmanProfessor of Psychology at the University of LeicesterRichard BradleyProfessor of Philosophy at the London School of Economics and Political Science.Producer: Thomas Morris.

Melvyn Bragg and his guests discuss Voltaire's novel Candide. First published in 1759, the novel follows the adventures of a young man, Candide, and his mentor, the philosopher Pangloss. Candide was written in the aftermath of a major earthquake in Lisbon and the outbreak of the Seven Years' War, events which caused such human suffering that they shook many people's faith in a benevolent God. Voltaire's masterpiece piles ridicule on Optimism, the fashionable philosophical belief that such disasters are part of God's plan for humanity - that 'all is for the best in this best of all possible worlds'.Often uproariously funny, the novel is a biting satire whose other targets include bad literature, extremist religion and the vanity of kings and politicians. It captivated contemporary readers and has proved one of French literature's most enduring classics.With:David WoottonAnniversary Professor of History at the University of YorkNicholas CronkProfessor of French Literature and Director of the Voltaire Foundation at the University of OxfordCaroline WarmanLecturer in French and Fellow of Jesus College at the University of Oxford.Producer: Thomas Morris.

Melvyn Bragg and his guests discuss the Battle of Bosworth Field, the celebrated encounter between Lancastrian and Yorkist forces in August 1485. The battle, the penultimate of the Wars of the Roses, resulted in the death of Richard III. The victory of Henry Tudor enabled him to succeed Richard as monarch and establish the Tudor dynasty which was to rule for over a century. These events were immortalised by Shakespeare in Richard III, and today the battle is regarded as one of the most important to have taken place on English soil. But little is known about what happened on the battlefield, and the very location of the encounter remains the subject of much debate.With:Anne CurryProfessor of Medieval History and Dean of Humanities at the University of SouthamptonSteven GunnTutor and Fellow in Modern History at Merton College, OxfordDavid GrummittLecturer in British History at the University of Kent.Producer: Thomas Morris.

Melvyn Bragg and his guests discuss Neoplatonism, the school of thought founded in the 3rd century AD by the philosopher Plotinus. Born in Egypt, Plotinus was brought up in the Platonic tradition, studying and reinterpreting the works of the Greek thinker Plato. After he moved to Rome Plotinus became the most influential member of a group of thinkers dedicated to Platonic scholarship. The Neoplatonists - a term only coined in the nineteenth century - brought a new religious sensibility to bear on Plato's thought. They outlined a complex cosmology which linked the human with the divine, headed by a mysterious power which they called the One. Neoplatonism shaped early Christian, Jewish and Muslim religious scholarship, and remained a dominant force in European thought until the Renaissance. With:Angie HobbsAssociate Professor of Philosophy and Senior Fellow in the Public Understanding of Philosophy at the University of WarwickPeter AdamsonProfessor of Ancient and Medieval Philosophy at King's College LondonAnne SheppardProfessor of Ancient Philosophy at Royal Holloway, University of LondonProducer: Thomas Morris.

Melvyn Bragg and his guests discuss the emergence of geology as a scientific discipline. A little over two hundred years ago a small group of friends founded the Geological Society of London. This organisation was the first devoted to furthering the discipline of geology - the study of the Earth, its history and composition. Although geology only emerged as a separate area of study in the late eighteenth century, many earlier thinkers had studied rocks, fossils and the materials from which the Earth is made. Ancient scholars in Egypt and Greece speculated about the Earth and its composition. And in the Renaissance the advent of mining brought further insight into the nature of objects found underground and how they got there. But how did such haphazard study of rocks and fossils develop into a rigorous scientific discipline?With:Stephen PumfreySenior Lecturer in the History of Science at Lancaster UniversityAndrew ScottProfessor of Applied Palaeobotany at Royal Holloway, University of LondonLeucha VeneerResearch Associate at the Centre for the History of Science, Technology and Medicine at the University of Manchester.Producer: Thomas Morris.

Melvyn Bragg and his guests discuss the origins of Quakerism. In the mid-seventeenth century an itinerant preacher, George Fox, became the central figure of a group known as the Religious Society of Friends, whose members believed it was possible to obtain contact with Christ without priestly intercession. The Quakers, as they became known, rejected the established Church and what they saw as the artificial pomp and artifice of its worship. They argued for religious toleration and for the equality of men and women. Persecuted for many years, particularly after the Restoration of Charles II in 1660, the Quakers survived to become an influential religious group, known for their pacifism and philanthropy. With:Justin ChampionProfessor of the History of Early Modern Ideas at Royal Holloway, University of LondonJohn CoffeyProfessor of Early Modern History at the University of LeicesterKate PetersFellow in History at Murray Edwards College at the University of Cambridge.Producer: Thomas Morris.

Melvyn Bragg and his guests discuss the measurement of time. Early civilisations used the movements of heavenly bodies to tell the time, but even in the ancient world more sophisticated timekeeping devices such as waterclocks were known. The development of mechanical clocks in Europe emerged in the medieval period when monks used such devices to sound an alarm to signal it was the hour to pray, although these clocks did not tell them the time. For hundreds of years clocks were inaccurate and it proved hard to remedy the problems, let alone settle on a standard time that the country should follow. It was with the advent of the railways that time finally became standardised in Britain in the mid-19th century and only in 1884 that Greenwich became the prime meridian of the world. Atomic clocks now mark the passing of the days, hours, and minutes and they are capable of keeping time to a second in 15 million years. With:Kristen LippincottFormer Director of the Royal Observatory, GreenwichJim BennettDirector of the Museum of the History of Science at the University of OxfordJonathan BettsSenior Curator of Horology at the Royal Observatory, GreenwichProducer: Natalia Fernandez.

Melvyn Bragg and his guests discuss the work and influence of the eighteenth-century philosopher Moses Mendelssohn. A prominent figure at the court of Frederick the Great, Mendelssohn was one of the most significant thinkers of his age. He came from a humble, but culturally rich background and his obvious intelligence was recognised from a young age and nurtured by the local rabbi where he lived in the town of Dessau in Prussia. Moses's learning earned him the sobriquet of the 'German Socrates' and he is considered to be one of the principal architects of the Haskala, the Jewish Enlightenment, and widely regarded as having helped bring Judaism into the mainstream of European culture. Mendelssohn is perhaps best remembered today for his efforts to bring Jewish and German culture closer together and for his plea for religious toleration.With:Christopher ClarkProfessor of Modern European History at the University of CambridgeAbigail GreenTutor and Fellow in History at the University of OxfordAdam SutcliffeSenior Lecturer in European History at King's College, London Producer: Natalia Fernandez.

Melvyn Bragg and his guests discuss Vitruvius' De Architectura. Written almost exactly two thousand years ago, Vitruvius' work is a ten-volume treatise on engineering and architecture, the only surviving work on the subject from the ancient world. This fascinating book offers unique insights into Roman technology and contains discussion of the general principles of architecture, the training of architects and the design of temples, houses and public buildings.The rediscovery of this seminal treatise in the 15th century provided the impetus for the neoclassical architectural movement, and Vitruvius exerted a significant influence on the work of Renaissance architects including Palladio, Brunelleschi and Alberti. It remains a hugely important text today, two millennia after it was written.With:Serafina CuomoReader in Roman History at Birkbeck, University of LondonRobert TavernorEmeritus Professor of Architecture and Urban Design at the London School of EconomicsAlice KoenigLecturer in Latin and Classical Studies at the University of St Andrews.Producer: Thomas Morris.

Melvyn Bragg and his guests discuss Lyrical Ballads, the collection of poems by William Wordsworth and Samuel Coleridge first published in 1798. The work was conceived as an attempt to cast off the stultifying conventions of formal 18th-century poetry. Wordsworth wrote that the poems it contains should be "considered as experiments. They were written chiefly with a view to ascertain how far the language of conversation in the middle and lower classes of society is adapted to the purpose of poetic pleasure."Lyrical Ballads contains some of the best-known work by Coleridge and Wordsworth, including The Rime of the Ancient Mariner and Tintern Abbey - and is today seen as a point of radical departure for poetry in English.With:Judith HawleyProfessor of Eighteenth-Century Literature at Royal Holloway, University of LondonJonathan BateProvost of Worcester College, OxfordPeter SwaabReader in English Literature at University College London.Producer: Thomas Morris.