Gary Zukav (born October 17, 1942) is an American spiritual teacher and the author of four consecutive New York Times Best Sellers. Zukav introduces the concept of the alignment of personality with soul as the creation of "authentic power". He asserts that a transformation of humanity is underway from a species that is limited to the perceptions of the five senses, evolves by surviving, and survives by pursuing "external power", which he defines as the ability to manipulate and control, into a species that is not limited to the perceptions of the five senses, evolves by growing spiritually, and grows spiritually by creating authentic power. He further asserts that this transformation brings with it the new potential of authentic power and that the pursuit of external power is henceforth counter-productive to our evolution and produces only violence and destruction.