"The Atman Project: A Transpersonal View of Human Development" (1980) unites Eastern and Western approaches into a single, coherent framework, integrating views from Freud to Buddha, Gestalt to Shankara, Piaget to Yogachara, Kohlberg to Krishnamurti. "Up from Eden: A Transpersonal View of Human Evolution" (1981) describes evolution as a magnificent journey of Spirit-in-action, drawing on theorists from Jean Gebser to Jurgen Habermas. The essay "Odyssey: A Personal Inquiry into Humanistic and Transpersonal Psychology" and a "New Age" interview with Ken Wilber.
Kenneth Earl Wilber II is an American philosopher and writer on transpersonal psychology and his own integral theory, a systematic philosophy which suggests the synthesis of all human knowledge and experience.
This two books in one collection. Up from Eden is possibly my favorite read in 5 years. I'm a huge Ken Wilber fan, and thought I'd read his best stuff and then came across this gem. A fascinating philosophical view of human development and evolution. I've already read this one twice this year, and will re-read many times more. Atman project is also very good.