Melvyn Bragg and guests discuss the concept of duty. George Bernard Shaw wrote in his play Caesar and Cleopatra, “When a stupid man is doing something he is ashamed of, he always declares that it is his duty”. But for Horatio Nelson and so many others, duty has provided a purpose for life, and a reason to die – “Thank God I have done my duty” were his final words.The idea that others have a claim over our actions has been at the heart of the history of civilised society, but duty is an unfashionable or difficult notion now - perhaps because it seems to impose an outside authority over self interest. The idea of duty has duped people into doing terrible things and inspired them to wonderful achievements, and it is an idea that has excited philosophers from the time people first came together to live in large groups. But has duty always meant doing what’s best for others rather than oneself? And how did it become such a powerful idea that people readily gave their lives for it? With Angie Hobbs, Lecturer in Philosophy at the University of Warwick; Annabel Brett, Fellow of Gonville and Caius and Lecturer in History at the University of Cambridge; Anthony Grayling, Reader in Philosophy at Birkbeck, University of London.

Melvyn Bragg and guests discuss the 19th century Parisian philosophy of life lived for art. In 1848 the young Parisian Henri Murger wrote of his bohemian friends: Their daily existence is a work of genius…they know how to practise abstinence with all the virtue of an anchorite, but if a slice of fortune falls into their hands you will see them at once mounted on the most ruinous fancies, loving the youngest and prettiest, drinking the oldest and best, and never finding sufficient windows to throw their money out of. Then, when their last crown is dead and buried...they go poaching on all the callings that have any connection with art, hunting from morn till night that wild beast called a five franc piece. Bohemianism meant a life lived for art, it meant sexual liberation and freedom from social constraint, but it also meant dodging the landlord and burning your poems to stay warm. How did the garret-philosophy of the Parisian Latin Quarter take over the drawing rooms of Bloomsbury and Chelsea, and why did a French war with necessity emerge as a British life-style as art? With Hermione Lee, Goldsmiths' Professor of English Literature at the University of Oxford and biographer of Virginia Woolf; Virginia Nicholson, author of Among the Bohemians: Experiments in Living 1900-1939; Graham Robb, writer and biographer of Balzac, Victor Hugo and Rimbaud.

Melvyn Bragg and guests discuss the history and philosophy of warfare. The British historian Edward Gibbon wrote: “Every age, however destitute of science or virtue, sufficiently abounds with acts of blood and military renown.” War, it seems, is one of mankind’s most constant companions, one that has blighted the lives and troubled the minds of men and women from antiquity onwards. Plato envisaged a society without war, but found it had no arts, no culture and no political system. In our own time the United Nations struggles but often fails to prevent the outbreak of conflict. But how has war been understood throughout the ages? Who has it served and how has it been justified? Is war inherent to human beings or could society be organised to the exclusion of all conflict?With Sir Michael Howard, Emeritus Professor of Modern History at the University of Oxford; Angie Hobbs, Lecturer in Philosophy at the University of Warwick; Jeremy Black, Professor of History at the University of Exeter.

Melvyn Bragg and guests explore the creative force of originality. How far is it to do with origins, how far with the combination of the discoveries of others, which were themselves based on the thoughts of others, into an ever-receding and replicating past? Is invention original? Is original important? Is tradition more interesting and the reworking of what is traditional of greater value than the search for idiosyncrasy? And did our notion of the original genius come as much out of a commercial imperative for individual copyright in the eighteenth century, as a romantic view of human nature which came in, perhaps not co-incidentally, at the same time? In 1800, in his preface to Lyrical Ballads, Wordsworth wrote "Every great and original writer, in proportion as he is great and original, must himself create the taste by which he is to be relished". But did the notion of originality begin with the Romantics in the 18th century, or has society always valued originality? Should we consider Shakespeare an innovator or a plagiarist?To what extent is originality about perception rather than conception and is originality a concept without meaning today?With John Deathridge, King Edward Professor of Music at King’s College London; Jonathan Rée, philosopher and author of Philosophical Tales; Professor Catherine Belsey, Chair of the Centre for Critical and Cultural Theory at Cardiff University

Melvyn Bragg and guests discuss redemption. In St Paul's letter to the Galatians, he wrote: "Christ has set us free; stand fast therefore, and do not submit again to a yoke of slavery". This conception of Redemption as freedom from bondage is crucial for Judeo-Christian thought. In Christianity, the liberation is from original sin, a transformation from the Fall to salvation - not just for mankind but for individual human beings. The content of that journey is moral, gaining redemption by becoming better.So why is the idea of transformation so appealing to human beings? To what extent were Christian views of Redemption borrowed from Judaism? How did philosophers such as Marx reinterpret the concept of Redemption and can redemption retain its value in a world without God? Does its continuing power signify a deep psychological need in humankind?With Richard Harries, Bishop of Oxford; Janet Soskice, Reader in Modern Theology and Philosophical Theology at Cambridge University; Stephen Mulhall, Fellow and Tutor in Philosophy at Oxford University.

Melvyn Bragg and guests discuss the Scottish Enlightenment of the 18th century. In 1696 the Edinburgh student, Thomas Aitkenhead, claimed theology was "a rhapsody of feigned and ill invented nonsense". He was hanged for his trouble - just one victim of a repressive religious society called the Scottish Kirk. Yet within 60 years Scotland was transformed by the ideas sweeping the continent in what we call the Enlightenment. This Scottish Enlightenment emerged on a broad front. From philosophy to farming it championed empiricism, questioned religion and debated reason. It was crowned by the philosophical brilliance of David Hume and by Adam Smith – the father of modern economics. But what led to this ‘Scottish Miracle’, was it an indigenous phenomenon or did it depend on influence from abroad? It profoundly influenced the American revolutionaries and the British Empire, but what legacy does it have for Scotland today?With Professor Tom Devine, Director of the Research Institute of Irish and Scottish Studies at the University of Aberdeen; Karen O’Brien, Reader in English and American Literature at the University of Warwick; Alexander Broadie, Professor of Logic and Rhetoric at the University of Glasgow.

Melvyn Bragg considers what it is to be free and how freedom became such a powerful value. Freedom has been a subject of enquiry for philosophers, theologians and politicians who have attempted to define the conditions required for humans to be free, not just in their minds but in the wider world. Some have argued that man is naturally free and no laws should confine his liberty. Others have countered that laws are the only way to preserve freedom; they protect us from the slavery of the abyss. The very idea of freedom is riddled with constraints, limitations and qualifications, yet it is seen by many as the most basic of human rights and for some as a principle worth fighting and dying for. With John Keane, Professor of Politics, University of Westminster; Bernard Williams, Professor of Philosophy, University of California; Annabel Brett, Lecturer in History, University of Cambridge.

Melvyn Bragg and guests discuss the Soul. In his poem ‘Sailing to Byzantium’ WB Yeats wrote:An aged man is but a paltry thing, A tattered coat upon a stick, unlessSoul clap its hands and sing, and louder singFor every tatter in its mortal dress. For Plato it was the immortal seat of reason, for Aristotle it could be found in plants and animals and was the essence of every being - but it died when the body died. For some it is the fount of creativity, for others the spark of God in man. What is the soul made of and where does it live? Is it the key to our individuality as humans? And when we die will our souls find paradise or purgatory, rebirth, resurrection or simply annihilation? With Richard Sorabji, Gresham Professor of Rhetoric at Gresham College; Ruth Padel, poet and author; Martin Palmer, Theologian and Director of the International Consultancy on Religion, Education and Culture.

Melvyn Bragg and guests discuss self-examination. Socrates, the Greek philosopher of the 4th century BC, famously declared that "The unexamined life is not worth living." His drive towards rigorous self-enquiry and his uncompromising questioning of assumptions laid firm foundations for the history of Western Philosophy. But these qualities did not make him popular in ancient Athens: Socrates was deemed to be a dangerous subversive for his crime, as he described it, of "asking questions and searching into myself and other men". In 399 BC Socrates was sentenced to death on the charge of being "an evil-doer and a curious person". Two thousand years later, the novelist George Eliot was moved to reply to Socrates that "The unexamined life may not be worth living, but the life too closely examined may not be lived at all". For Eliot too much self-scrutiny could lead to paralysis rather than clarity. What did Socrates mean by his injunction? How have our preoccupations about how to live altered since the birth of ancient Greek philosophy? And where does philosophy rank in our quest for self-knowledge alongside science, the arts and religion? With Dr Anthony Grayling, Reader in Philosophy, Birkbeck, University of London; Janet Radcliffe Richards, Philosopher of Science and Reader in Bioethics, University College, London; Julian Baggini, Editor, The Philosopher’s Magazine and co-editor of New British Philosophy: The Interviews.

Melvyn Bragg and guests discuss the history of virtue. When Socrates asked the question ‘How should man live?’ Plato and Aristotle answered that man should live a life of virtue. Plato claimed there were four great virtues - Temperance, Justice, Prudence and Courage and the Christian Church added three more - Faith, Hope and Love. But where does the motivation for virtue come from? Do we need rules to tell us how to behave or can we rely on our feelings of compassion and empathy towards other human beings? Shakespeare’s Iago says “Virtue! A fig! ‘tis in ourselves that we are thus or thus. Our bodies are our gardens to the which our wills are gardeners. ” So is virtue a character trait possessed by some but not others? Is it derived from reason? Or does it flow from the innate sympathies of the human heart? For the last two thousand years philosophers have grappled with these ideas, but now in the twenty first century a modern reappraisal of virtue is taking the argument back to basics with Aristotle. With Galen Strawson, Professor of Philosophy at the University of Reading; Miranda Fricker, Lecturer in Philosophy at Birkbeck, University of London; Roger Crisp, Uehiro Fellow and Tutor in Philosophy at St Anne's College, Oxford.