The Routledge Companion to Ancient Philosophy is a collection of new essays on the philosophy and philosophers of the ancient Greek and Roman worlds. Written by a cast of international scholars, it covers the full range of ancient philosophy from the sixth century BC to the sixth century AD and beyond. There are dedicated discussions of the major areas of the philosophy of Plato and Aristotle together with accounts of their predecessors and successors.

The contributors also address various problems of interpretation and method, highlighting the particular demands and interest of working with ancient philosophical texts. All original texts discussed are translated into English.