Karl Marx's theories have shaped and directed political economic, and social thought for 150 years. Here the renowned philosopher Peter Singer describes Marx's life and early ideas before clearly and concisely identifying the central vision that unifies Marx's thought and enables us to grasp it as a whole. In this new edition. Singer explores whether Marx and his ideas remain relevant to politics and society today. Assessing Marx's impact and the predictions he made, Singer asks if, for the foreseeable future, there is any realistic prospect of replacing capitalism with a better system of production and distribution.