I’m writing a book on the history of the human potential movement and transhumanism, told through the lens of the Huxley family (Thomas, Aldous and Julian) and their friends. The book argues that the Huxleys were religious prophets, who imagined a future evolutionary religion of expanding human potential. I suggest this religion or worldview, which weaved through the late 19th and 20th centuries, is going to become yet more influential in the era of genomics.