In Our Time

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 theor...

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 w...

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 Carthagini...

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 polit...

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...

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...

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 th...

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, a...

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 states...

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 signifi...

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 writ...

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...

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 pe...

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 w...

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...

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 n...

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...

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. Volt...

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 immor...

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 Neoplato...

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 eig...

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...

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, al...

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 i...

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 ar...