Wilber's groundbreaking synthesis of religion, philosophy, physics, and psychology started a revolution in transpersonal psychology.
He was the first to suggest in a systematic way that the great psychological systems of the West could be integrated with the noble contemplative traditions of the East.
Spectrum of Consciousness , first released by Quest in 1977, has been the prominent reference point for all subsequent attempts at integrating psychology and spirituality.
Quest Books (il) The spectrum of consciousness, paperback/ken wilber
