Philosophy is the study of fundamental questions concerning the nature of reality, existence, reason, knowledge, and values. This book traces the historical development of philosophical thought from the Ancient Greeks to the present day. It explores the five main branches of philosophy - metaphysics, epistemology, logic, ethics, and aesthetics - and includes biographies of significant philosophers and accounts of important texts. It is an accessible and fascinating account of the preoccupations of some of the world's greatest thinkers.