This book gathers a wealth of insight and information on 50 of the greatest philosophical thinkers and 10 of the greatest concepts ever conceived. Get 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, Atistotle and Plato to the revolutionary polemics of Marx and the educational lessons of Piaget and Chomsky. Everything you need to know about the ground-breaking, complex world of philosophy, expertly packed into a pocke full of knowledge.