The history of ideas is a huge subject which is of enduring interest and central importance for understanding how we have become who we are. In this new title in the Lion Access Guides series, Kevin O'Donnell presents a lively overview of the major philosophers and movements through the ages, showing how they have influenced society and history. Beginning with the Greeks, the book takes us through eastern philosophy, the birth of Christianity, the medieval period, the enlightenment, the modern age and the postmodern condition. The book also explores how concepts of God have changed as different world-views have developed. Major thinkers covered include: Socrates, Plato, Aristotle, Augustine, Aquinas, Descartes, Kant, Newton, Nietzsche and Einstein.