In Our Time

Melvyn Bragg and guests discuss the siege of Constantinople in 1453. When Sultan Mehmet the Second rode into the city of Constantinople on a white horse in 1453, it marked the end of a thousand years of the Byzantine Empire. After holding out for 53 days, the city had fallen. And as one contemporary witness described it: “The blood flowed in the city like rainwater in the gutters after a sudden storm”. It was the end of the classical world and the crowning of an Ottoman Empire that would last until 1922.Constantinople was a city worth fighting for – its position as a bridge between Europe and Asia and its triangular shape with a deep water port made it ideal both for trade and defence. It was also rumoured to harbour great wealth. Whoever conquered it would reap rewards both material and political. Earlier attempts to capture the city had largely failed – so why did the Ottomans succeed this time? What difference did the advances in weaponry such as cannons make in the outcome of the battle? And what effect did the fall of Constantinople have on the rest of the Christian world?With Roger Crowley, author and historian; Judith Herrin, Professor of Late Antique and Byzantine Studies at King's College London; Colin Imber, formerly Reader in Turkish at Manchester University.

Melvyn Bragg and guests discuss hell and its representation in literature and the visual arts, through the ages from Ancient Egypt to modern Christianity. Why do certain religions have a Satan figure and others don’t? And why did hell shift from the underworld to here on earth in 20th Century representations?A fiery vault beneath the earth or as Sartre put it, other people - it seems our ideas of hell are inevitably shaped by religious and cultural forces. For Homer and Virgil it’s a place you can visit and return from, often a wiser person for it. With Christianity it’s a one way journey and a just punishment for a sinful, unrepentant life. Writers and painters like Dante and Hieronymus Bosch gave free rein to their imaginations, depicting a complex hierarchical world filled with the writhing bodies of tormented sinners. In the 20th century hell can be found on earth in portrayals of war and the Holocaust but also in the mind, particularly in the works of TS Eliot and Primo Levi. So what is the purpose of hell and why is it found mainly in religions concerned with salvation? Why has hell proved so inspirational for artists through the ages, perhaps more so than heaven? And why do some ideas of hell require a Satan figure while others don't?With Martin Palmer, Director of the International Consultancy on Religion, Education and Culture; Margaret Kean, Tutor and Fellow in English at St Hilda’s College, Oxford; Neil MacGregor, Director of the British Museum.

Melvyn Bragg and guests discuss the contribution Indian mathematicians have made to our understanding of the subject. Mathematics from the Indian subcontinent has provided foundations for much of our modern thinking on the subject. They were thought to be the first to use zero as a number. Our modern numerals have their roots there too. And mathematicians in the area that is now India, Pakistan and Bangladesh were grappling with concepts such as infinity centuries before Europe got to grips with it. There’s even a suggestion that Indian mathematicians discovered Pythagoras’ theorem before Pythagoras. Some of these advances have their basis in early religious texts which describe the geometry necessary for building falcon-shaped altars of precise dimensions. Astronomical calculations used to decide the dates of religious festivals also encouraged these mathematical developments. So how were these advances passed on to the rest of the world? And why was the contribution of mathematicians from this area ignored by Europe for centuries?With George Gheverghese Joseph, Honorary Reader in Mathematics Education at Manchester University; Colva Roney-Dougal, Lecturer in Pure Mathematics at the University of St Andrews; Dennis Almeida, Lecturer in Mathematics Education at Exeter University and the Open University.

Melvyn Bragg and guests discuss Anarchism and why its political ideas became synonymous with chaos and disorder. Pierre Joseph Proudhon famously declared “property is theft”. And perhaps more surprisingly that “Anarchy is order”. Speaking in 1840, he was the first self-proclaimed anarchist. Anarchy comes from the Greek word “anarchos”, meaning “without rulers”, and the movement draws on the ideas of philosophers like William Godwin and John Locke. It is also prominent in Taoism, Buddhism and other religions. In Christianity, for example, St Paul said there is no authority except God. The anarchist rejection of a ruling class inspired communist thinkers too. Peter Kropotkin, a Russian prince and leading anarcho-communist, led this rousing cry in 1897: “Either the State for ever, crushing individual and local life... Or the destruction of States and new life starting again.. on the principles of the lively initiative of the individual and groups and that of free agreement. The choice lies with you!” In the Spanish Civil War, anarchists embarked on the largest experiment to date in organising society along anarchist principles. Although it ultimately failed, it was not without successes along the way.So why has anarchism become synonymous with chaos and disorder? What factors came together to make the 19th century and early 20th century the high point for its ideas? How has its philosophy influenced other movements from The Diggers and Ranters to communism, feminism and eco-warriors?With John Keane, Professor of Politics at Westminster University; Ruth Kinna, Senior Lecturer in Politics at Loughborough University; Peter Marshall, philosopher and historian.

Melvyn Bragg and guests discuss the speed of light. Scientists and thinkers have been fascinated with the speed of light for millennia. Aristotle wrongly contended that the speed of light was infinite, but it was the 17th Century before serious attempts were made to measure its actual velocity – we now know that it’s 186,000 miles per second. Then in 1905 Einstein’s Special Theory of Relativity predicted that nothing can travel faster than the speed of light. This then has dramatic effects on the nature of space and time. It’s been thought the speed of light is a constant in Nature, a kind of cosmic speed limit, now the scientists aren’t so sure. With John Barrow, Professor of Mathematical Sciences and Gresham Professor of Astronomy at Cambridge University; Iwan Morus, Senior Lecturer in the History of Science at The University of Wales, Aberystwyth; Jocelyn Bell Burnell, Visiting Professor of Astrophysics at Oxford University.

Melvyn Bragg and guests discuss altruism. The term altruism was coined by the 19th century sociologist Auguste Comte and is derived from the Latin “alteri” or "the others”. It describes an unselfish attention to the needs of others. Comte declared that man had a moral duty to “serve humanity, whose we are entirely.” The idea of altruism is central to the main religions: Jesus declared “you shall love your neighbour as yourself” and Mohammed said “none of you truly believes until he wishes for his brother what he wishes for himself”. Buddhism too advocates “seeking for others the happiness one desires for oneself.”Philosophers throughout time have debated whether such benevolence towards others is rooted in our natural inclinations or is a virtue we must impose on our nature through duty, religious or otherwise. Then in 1859 Darwin’s ideas about competition and natural selection exploded onto the scene. His theories outlined in the Origin of Species painted a world “red in tooth and claw” as every organism struggles for ascendancy.So how does this square with altruism? If both mankind and the natural world are selfishly seeking to promote their own survival and advancement, how can we explain being kind to others, sometimes at our own expense? How have philosophical ideas about altruism responded to evolutionary theory? And paradoxically, is it possible that altruism can, in fact, be selfish?With Miranda Fricker, Senior Lecturer in the School of Philosophy at Birkbeck, University of London; Richard Dawkins, evolutionary biologist and the Charles Simonyi Professor of the Public Understanding of Science at Oxford University; John Dupré, Professor of Philosophy of Science at Exeter University and director of Egenis, the ESRC Centre for Genomics in Society.

Melvyn Bragg and guests discuss the Peasants’ Revolt of 1381. “When Adam delved and Eve span, who was then the Gentleman?" these are the opening words of a rousing sermon, said to be by John Ball, which fires a broadside at the deeply hierarchical nature of fourteenth century England. Ball, along with Wat Tyler, was one of the principal leaders of the Peasants’ Revolt – his sermon ends: "I exhort you to consider that now the time is come, appointed to us by God, in which ye may (if ye will) cast off the yoke of bondage, and recover liberty". The subsequent events of June 1381 represent a pivotal and thrilling moment in England’s history, characterised by murder and mayhem, beheadings and betrayal, a boy-King and his absent uncle, and a general riot of destruction and death. By most interpretations, the course of this sensational story threatened to undermine the very fabric of government as an awareness of deep injustice was awakened in the general populace.But who were the rebels and how close did they really come to upending the status quo? And just how exaggerated are claims that the Peasants’ Revolt laid the foundations of the long-standing English tradition of radical egalitarianism? With Miri Rubin, Professor of Early Modern History at Queen Mary, University of London; Caroline Barron, Professorial Research Fellow at Royal Holloway, University of London; Alastair Dunn, author of The Peasants’ Revolt - England’s Failed Revolution of 1381.

Melvyn Bragg and guests discuss the life and work of Alexander Pope. His enemies – who were numerous - described him as a hunchbacked toad, twisted in body, twisted in mind, but Alexander Pope is without doubt one of the greatest poets of the English language. His acerbic wit and biting satire were the scourge of politicians, fellow writers and most especially the critics. He was the first Englishman to make a living from his pen, free from the shackles of patronage and flattery. Indeed, his sharp tongue meant he couldn’t go out walking without his Great Dane and a pair of loaded pistols. He was a ferocious businessman too, striking tough deals with his publishers, ensuring he kept control of his work and was well-rewarded for it. So how did Pope manage to transform himself from a crippled outsider into a major cultural and moral authority? How did he shape our ideas about what a “modern author” is? Does his work still have resonances today or is it too firmly embedded in the politics, cultural life and rivalries of the period?With John Mullan, Professor of English at University College London; Jim McLaverty, Professor of English at Keele University; Valerie Rumbold, Reader in English Literature at Birmingham University.

Melvyn Bragg and guests discuss the Poincaré Conjecture. The great French mathematician Henri Poincaré declared: “The scientist does not study mathematics because it is useful; he studies it because he delights in it, and he delights in it because it is beautiful. If nature were not beautiful, it would not be worth knowing and life would not be worth living. And it is because simplicity, because grandeur, is beautiful that we preferably seek simple facts, sublime facts, and that we delight now to follow the majestic course of the stars.” Poincaré’s ground-breaking work in the 19th and early 20th century has indeed led us to the stars and the consideration of the shape of the universe itself. He is known as the father of topology – the study of the properties of shapes and how they can be deformed. His famous Conjecture in this field has been causing mathematicians sleepless nights ever since. He is also credited as the Father of Chaos Theory.So how did this great polymath change the way we understand the world and indeed the universe? Why did his conjecture remain unproved for almost a century? And has it finally been cracked?With June Barrow-Green, Lecturer in the History of Mathematics at the Open University; Ian Stewart, Professor of Mathematics at the University of Warwick; Marcus du Sautoy, Professor of Mathematics at the University of Oxford.

Melvyn Bragg and guests discuss the French encyclopédie, the European Enlightenment in book form. One of its editors, D’Alembert, described its mission as giving an overview of knowledge, as if gazing down on a vast labyrinth of all the branches of human ideas, observing where they separate or unite and even catching sight of the secret routes between them. It was a project that attracted some of the greatest thinkers of the Enlightenment - Voltaire, Rousseau and Diderot - striving to bring together all that was known of the world in one comprehensive encyclopaedia. No subject was too great or too small, so while Voltaire wrote of “fantasie” and “elegance”, Diderot rolled up his sleeves and got to grips with jam-making.The resulting Encyclopédie was a bestseller - running to 28 volumes over more than 20 years, amidst censorship, bans, betrayals and reprieves. It even got them excited on this side of the Channel, with subscribers including Oliver Goldsmith, Samuel Johnson and Charles Burney. So what drove these men to such lengths that they were prepared to risk ridicule, prison, even exile? How did the Encyclopédie embody the values of the Enlightenment? And what was its legacy – did it really fuel the French Revolution? With Judith Hawley, Senior Lecturer in English at Royal Holloway, University of London; Caroline Warman, Fellow and Tutor in French at Jesus College, Oxford; David Wootton, Anniversary Professor of History at the University of York.