In this revised and expanded second edition, a team of distinguished scholars, assembled by the editor Oliver Leaman, have brought Ninian Smart's masterpiece up to date for the twenty-first century. Chapters have been revised by experts in the field to include recent philosophical developments, and the book includes a new bibliographic guide to resources in world philosophies. A brand new introduction which celebrates the career and writings of Ninian Smart, and his contribution to the study of world religions, helps set the work in context.