This smart handbook gathers a wealth of insight and information on 50 of the greatest philosophical thinkers and 10 of the greatest theories ever conceived in a concise and accessible format. Readers will come to grips with the key concepts that are the backbone of philosophical thought, including metaphysics, psychoanalysis, libertarianism, and feminism. The most influential figures are presented, from the classical voices of Socrates, Aristotle, and Plato to the revolutionary polemics of Marx and the educational lessons of Piaget and Chomsky. This book is for an aspiring intellectual, a deep thinker, or anyone who wants to brush up on what they forgot from college. Everything one needs to know about the groundbreaking, complex world of philosophy is expertly packed into this pocketful of knowledge.