 Karl Marx (1818–1883) is often treated as a revolutionary, an activist rather than a philosopher, whose works inspired the foundation of many communist regimes in the twentieth century. It is certainly hard to find many thinkers who can be said to have had comparable influence in the creation of the modern world. However, Marx was trained as a philosopher, and although often portrayed as moving away from philosophy in his mid-twenties—perhaps towards history and the social sciences—there are many points of contact with modern philosophical debates throughout his writings.