Ken Wilber (Oklahoma, 1949) is one of the most influential thinkers in the United States, and one of the most intriguing figures that has given the intellectuals of that country in recent years. Prolific author, is considered the main student of consciousness, transpersonal psychology and comprehensive approach. He has developed a "comprehensive theory of Everything" that encompasses the truths of all the great psychological, scientific, philosophical and spiritual traditions that constitute the "perennial wisdom". Wilber has an extensive bibliography: Brief history of all things, Consciousness without borders, A sociable God or The three eyes of knowledge are some of his titles published by Kairos.