Melvyn Bragg and guests discuss Plato's account of the once great island of Atlantis out to the west, beyond the world known to his fellow Athenians, and why it disappeared many thousands of years before his time. There are no sources for this story other than Plato, and he tells it across two of his works, the Timaeus and the Critias, tantalizing his readers with evidence that it is true and clues that it is a fantasy. Atlantis, for Plato, is a way to explore what an ideal republic really is, and whether Athens could be (or ever was) one; to European travellers in the Renaissance, though, his story reflected their own encounters with distant lands, previously unknown to them, spurring generations of explorers to scour the oceans and in the hope of finding a lost world. The image above is from an engraving of the legendary island of Atlantis after a description by Athanasius Kircher (1602-1680). With Edith Hall Professor of Classics at Durham University Christopher Gill Emeritus Professor of Ancient Thought at the University of Exeter And Angie Hobbs Professor of the Public Understanding of Philosophy at the University of Sheffield Producer: Simon Tillotson

Melvyn Bragg and guests discuss ideas of Georg Wilhelm Friedrich Hegel (1770 - 1831) on history. Hegel, one of the most influential of the modern philosophers, described history as the progress in the consciousness of freedom, asking whether we enjoy more freedom now than those who came before us. To explore this, he looked into the past to identify periods when freedom was moving from the one to the few to the all, arguing that once we understand the true nature of freedom we reach an endpoint in understanding. That end of history, as it's known, describes an understanding of freedom so far progressed, so profound, that it cannot be extended or deepened even if it can be lost. With Sally Sedgwick Professor and Chair of Philosophy at Boston University Robert Stern Professor of Philosophy at the University of Sheffield And Stephen Houlgate Professor of Philosophy at the University of Warwick Producer: Simon Tillotson

Melvyn Bragg and guests discuss the Czech educator Jan Amos Komenský (1592-1670) known throughout Europe in his lifetime under the Latin version of his name, Comenius. A Protestant and member of the Unity of Brethren, he lived much of his life in exile, expelled from his homeland under the Catholic Counter-Reformation, and he wanted to address the deep antagonisms underlying the wars that were devastating Europe especially The Thirty Years War (1618-1648). A major part of his plan was Universal Education, in which everyone could learn about everything, and better understand each other and so tolerate their religious differences and live side by side. His ideas were to have a lasting influence on education, even though the peace that followed the Thirty Years War only entrenched the changes in his homeland that made his life there impossible. The image above is from a portrait of Comenius by Jürgen Ovens, 1650 - 1670, painted while he was living in Amsterdam and held in the Rikjsmuseum With Vladimir Urbanek Senior Researcher in the Department of Comenius Studies and Early Modern Intellectual History at the Institute of Philosophy of the Czech Academy of Sciences Suzanna Ivanic Lecturer in Early Modern European History at the University of Kent And Howard Hotson Professor of Early Modern Intellectual History at the University of Oxford and Fellow of St Anne’s College Producer: Simon Tillotson

Melvyn Bragg and guests discuss the idea of charismatic authority developed by Max Weber (1864-1920) to explain why people welcome some as their legitimate rulers and follow them loyally, for better or worse, while following others only dutifully or grudgingly. Weber was fascinated by those such as Napoleon (above) and Washington who achieved power not by right, as with traditional monarchs, or by law as with the bureaucratic world around him in Germany, but by revolution or insurrection. Drawing on the experience of religious figures, he contended that these leaders, often outsiders, needed to be seen as exceptional, heroic and even miraculous to command loyalty, and could stay in power for as long as the people were enthralled and the miracles they had promised kept coming. After the Second World War, Weber's idea attracted new attention as a way of understanding why some reviled leaders once had mass support and, with the arrival of television, why some politicians were more engaging and influential on screen than others. With Linda Woodhead The FD Maurice Professor and Head of the Department of Theology and Religious Studies at King's College London David Bell The Lapidus Professor in the Department of History at Princeton University And Tom Wright Reader in Rhetoric at the University of Sussex Producer: Simon Tillotson

Melvyn Bragg and guests discuss the ancient Sanskrit text the Arthashastra, regarded as one of the major works of Indian literature. Written in the style of a scientific treatise, it provides rulers with a guide on how to govern their territory and sets out what the structure, economic policy and foreign affairs of the ideal state should be. According to legend, it was written by Chanakya, a political advisor to the ruler Chandragupta Maurya (reigned 321 – 297 BC) who founded the Mauryan Empire, the first great Empire in the Indian subcontinent. As the Arthashastra asserts that a ruler should pursue his goals ruthlessly by whatever means is required, it has been compared with the 16th-century work The Prince by Machiavelli. Today, it is widely viewed as presenting a sophisticated and refined analysis of the nature, dynamics and challenges of rulership, and scholars value it partly because it undermines colonial stereotypes of what early South Asian society was like. With Jessica Frazier Lecturer in the Study of Religion at the University of Oxford and a Fellow of the Oxford Centre for Hindu Studies James Hegarty Professor of Sanskrit and Indian Religions at Cardiff University And Deven Patel Associate Professor of South Asia Studies at the University of Pennsylvania Producer: Simon Tillotson