Conversation so far:
what is secular humanism?
Secular humanism posits that human beings are capable of being ethical and moral without religion or belief in a deity
Did Julian Huxley come up with the theory of secular humanism?
As an organized movement, Humanism is quite recent, born at the University of Chicago in the 1920s, and made public in 1933 with the publication of the first Humanist Manifesto.

Question: did Julian write about this theory?
Self-contained rewrite: Did Julian Huxley write about the secular humanism theory?