JULIAN BAGGINI Philosopher and also editor and co-founder of The Philosophers' Magazine. He has a PhD on the philosophy of personal identity and is the author, co-author or editor of 17 popular philosophy books. His monthly philosophy podcast is available on iTunes or via the website. He has written for numerous newspapers and magazines, as well as for the think tanks The Institute of Public Policy Research and Demos. GARETH SOUTHWELL Philosopher, author and illustrator based in Swansea, UK. He has run the website Philosophy Online for the last 10 years. His other publications include guides to Descartes and Nietzsche, and Words of Wisdom, an exploration of 360 of philosophy's most important quotations.