Julian of Norwich

In the 500th edition of the programme, Melvyn Bragg and his guests discuss the philosophical idea of free will.Free will - the extent to which we are free to choose our own actions - is one of the most absorbing philosophical problems, debated by almost every great thinker of the last two thousand years. In a universe apparently governed by physical laws, is it possible for individuals to be responsible for their own actions? Or are our lives simply proceeding along preordained paths? Determinism - the doctrine that every event is the inevitable consequence of what goes before - seems to suggest so.Many intellectuals have concluded that free will is logically impossible. The philosopher Baruch Spinoza regarded it as a delusion. Albert Einstein wrote: "Human beings, in their thinking, feeling and acting are not free agents but are as causally bound as the stars in their motion." But in the Enlightenment, philosophers including David Hume found ways in which free will and determinism could be reconciled. Recent scientific developments mean that this debate remains as lively today as it was in the ancient world.With: Simon BlackburnBertrand Russell Professor of Philosophy at the University of CambridgeHelen BeebeeProfessor of Philosophy at the University of BirminghamGalen StrawsonProfessor of Philosophy at the University of ReadingProducer: Thomas Morris.

10 Mars 201142min

Melvyn Bragg and his guests discuss the age of the Universe.Since the 18th century, when scientists first realised that the Universe had existed for more than a few thousand years, cosmologists have debated its likely age. The discovery that the Universe was expanding allowed the first informed estimates of its age to be made by the great astronomer Edwin Hubble in the early decades of the twentieth century. Hubble's estimate of the rate at which the Universe is expanding, the so-called Hubble Constant, has been progressively improved. Today cosmologists have a variety of other methods for ageing the Universe, most recently the detailed measurements of cosmic microwave background radiation - the afterglow of the Big Bang - made in the last decade. And all these methods seem to agree on one thing: the Universe has existed for around 13.75 billion years.With:Martin ReesAstronomer Royal and Emeritus Professor of Cosmology and Astrophysics at the University of CambridgeCarolin CrawfordMember of the Institute of Astronomy and Fellow of Emmanuel College at the University of CambridgeCarlos FrenkDirector of the Institute for Computational Cosmology at the University of Durham.Producer: Thomas Morris.

3 Mars 201142min

Melvyn Bragg and his guests discuss the Taiping Rebellion.In 1850 a Chinese Christian convert, Hong Xiuquan, proclaimed himself leader of a new dynasty, the Taiping Heavenly Kingdom. He and his followers marched against the ruling Qing dynasty, gathering huge support as they went. The ensuing civil war lasted fourteen years; around twenty million people lost their lives in a conflict which eventually involved European as well as Chinese soldiers. The Taiping Rebellion was arguably the most important event to befall China in the 19th century. Chinese nationalists and communists alike have been profoundly influenced by it, and historians believe it shaped modern China in the same way as the First World War shaped modern Europe.Rana MitterProfessor of the History and Politics of Modern China at the University of OxfordFrances WoodHead of the Chinese Section at the British LibraryJulia LovellLecturer in Chinese History at Birkbeck, University of London.Producer: Thomas Morris.

24 Feb 201141min

Melvyn Bragg and his guests discuss the work and influence of Maimonides.Widely regarded as the greatest Jewish philosopher of the medieval period, Maimonides was also a physician and rabbinical authority. Also known as Rambam, his writings include a 14-volume work on Jewish law, the Mishneh Torah, which is still widely used today, and the Guide for the Perplexed, a central work of medieval philosophy. Although undoubtedly a titan of Jewish intellectual history, Maimonides was also profoundly influenced by the Islamic world. He exerted a strong influence on later Islamic philosophy, as well as on thinkers ranging from Thomas Aquinas to Leibniz and Newton.With:John HaldaneProfessor of Philosophy at the University of St AndrewsSarah StroumsaAlice and Jack Ormut Professor of Arabic Studies and currently Rector at the Hebrew University of JerusalemPeter AdamsonProfessor of Ancient and Medieval Philosophy at King's College London.Producer: Thomas Morris.

15 Feb 201142min

Melvyn Bragg and his guests discuss the nervous system.Most animals have a nervous system, a network of nerve tissues which allows parts of the body to communicate with each other. In humans the most significant parts of this network are the brain, spinal column and retinas, which together make up the central nervous system. But there is also a peripheral nervous system, which enables sensation, movement and the regulation of the major organs.Scholars first described the nerves of the human body over two thousand years ago. For 1400 years it was believed that they were animated by 'animal spirits', mysterious powers which caused sensation and movement. In the eighteenth century scientists discovered that nerve fibres transmitted electrical impulses; it was not until the twentieth century that chemical agents - neurotransmitters - were first identified.With:Colin Blakemore Professor of Neuroscience at the University of OxfordVivian Nutton Emeritus Professor of the History of Medicine at University College, LondonTilli Tansey Professor of the History of Modern Medical Sciences at Queen Mary, University of London.Producer: Thomas Morris.

10 Feb 201142min

Melvyn Bragg and his guests discuss the Battle of Bannockburn.On June 23rd 1314, Scottish forces under their king Robert the Bruce confronted a larger army commanded by the English monarch Edward II at Bannockburn. It was the culmination of a war of independence which had been going on since the English had invaded Scotland in 1296. After eighteen years of intermittent fighting the English had been all but expelled from Scotland: their last stronghold was the castle at Stirling.The Scots won a decisive victory at Bannockburn. The English were routed and their king narrowly escaped capture. Although it took a further 14 years for Scotland to achieve full independence with the 1328 Treaty of Edinburgh-Northampton, this was an important triumph; today it remains one of the most discussed moments in the nation's history.With:Matthew StricklandProfessor of Medieval History at the University of GlasgowFiona WatsonHonorary Research Fellow in History at the University of DundeeMichael BrownReader in History at the University of St Andrews Producer: Thomas Morris.

2 Feb 201142min

Melvyn Bragg and his guests discuss Aristotle's Poetics. The Poetics is, as far as we know, the first ever work of literary theory. Written in the 4th century BC, it is the work of a scholar who was also a biologist, and treats literary works with the detached analytical eye of a scientist. Aristotle examines drama and epic poetry, and how they achieve their effects; he analyses tragedy and the ways in which it plays on our emotions. Many of the ideas he articulates, such as catharsis, have remained in our critical vocabulary ever since. The book also contains an impassioned defence of poetry, which had been attacked by other thinkers, including Aristotle's own teacher Plato.Translated by medieval Arab scholars, the Poetics was rediscovered in Europe during the Renaissance and became a playwriting manual for many dramatists of the era. Today it remains a standard text for would-be Hollywood screenwriters.With:Angie HobbsAssociate Professor of Philosophy and Senior Fellow in the Public Understanding of Philosophy at the University of WarwickNick LoweReader in Classical Literature at Royal Holloway, University of LondonStephen HalliwellProfessor of Greek at the University of St AndrewsProducer: Thomas Morris.

27 Jan 201142min

Melvyn Bragg and his guests discuss the Mexican Revolution.In 1908 the President of Mexico, Porfirio Diaz, gave an interview to an American journalist. He was 77 and had ruled the country in autocratic fashion for over thirty years. He discussed the country's economic development and spoke of his intention to retire to his country estate after overseeing a transition to multiparty democracy.Things did not turn out quite like that. Two years later Diaz was toppled by a popular uprising. It was the beginning of a tumultuous decade in which different factions fought for supremacy, and power changed hands many times. The conflict completely changed the face of the country, and resulted in the emergence of Mexico's most celebrated folk hero: Emiliano Zapata.With:Alan KnightProfessor of the History of Latin America at the University of OxfordPaul GarnerCowdray Professor of Spanish at the University of LeedsPatience SchellSenior Lecturer in Latin American Cultural Studies at the University of Manchester. Producer: Thomas Morris.

20 Jan 201142min