Thomas Aquinas was first and foremost a Christian theologian. Yet he was also one of the greatest philosophers of the Middle Ages. Drawing on classical authors, and incorporating ideas from Jewish and Arab sources, he came to offer a rounded and lasting account of the origin of the universe and of the things to be found within it, especially human beings.

Routledge is now re-issuing this prestigious series of 204 volumes originally published between 1910 and 1965. The titles include works by key figures such asC.G. Jung, Sigmund Freud, Jean Piaget, Otto Rank, James Hillman, Erich Fromm, Karen Horney and Susan Isaacs. Each volume is available on its own, as part of a themed mini-set, or as part of a specially-priced 204-volume set. A brochure listing each title in the "International Library of Psychology" series is available upon request.