This is a concise, comprehensive guide that covers the main schools of thought from the Ancient Chinese philosophies of Confucius and Lao Tzu; Ancient wisdom from Aristotle, Plato, Zeno and Pythagoras; through to those most influential of philosophers studied the world over -- Hegel, Marx, Descartes, Kant, Kierkegaard and Wittgenstein. It also discusses the "big questions", such as: What is truth? What kind of person is it good to be? What do we know and how do we know it? It considers the relationship between philosophy and religion, and the problem of morality. The book takes a two-pronged approach that looks at the chronological development of philosophical thought and the people behind the different schools of thinking. These definitive guides to their subjects together have sold over three million copies worldwide. Their success is undoubtedly owed to the comprehensiveness and quality of content, for an excellent price, and the smaller size is nonetheless filled with 400 illustrations.