The notion of identity - personal, religious, ethnic or national - is one that has given rise to heated passions and crimes throughout the history of mankind. What it is that makes each one of us unique and dissimilar to any other individual has been one of the fundamental questions of philosophy from Socrates to Freud. In this important series of reflections, the author, a Lebanese who now lives in France, where he is a well-known writer and commentator, considers how we define ourselves and how identity is understood in the world's different cultures.