"Now in its second edition the Key Guide surveys the most influential thinkers of the twentieth and twenty-first centuries. With a new introduction by the author as well as two new sections on Phenomenology and the Post-Human, full cross referencing and up-to-date guides to major primary and secondary texts, this is an essential read for anyone interested in the thinking that drives today's world. Students and general readers alike will be pleased to find such an accessible guide to some of the most hard-to-grasp ideas around."