Thomas Henry Huxley was one of the most rabid godless types who ever put pen to paper. Unquestionably brilliant, unquestionably foolish. No wonder he was called "Darwin's Bulldog." For those hinged to reality who want to read rhetoric of the highest quality defending the Darwinist speculation or godlessness in general, I cannot recommend him highly enough. I would even go so far as to recommend him to the godless: upon doing so, they would find that there is nothing new on offer of relevance by the Hitchens, Dawkins, Harris, or Dennetts of the world, plus he says it much better. Not that he was original by any means either: essentially no argument he made of relevance wasn't said just as well if not better during the latter part of the 17th century. Also, his opinions on many things were spot on. This was due primarily to the fact that while it is true that he was at the vanguard of the attack upon civilization by the godless in the 19th century, he was yet restrained by the mores (bourgeois 'morality') that held sway at that time.
The previous notwithstanding, I was surprised when I read in Teddy Roosevelt's The Influence of the Bible a reference to Huxley's On the Natural Inequality of Men. My guess is that Roosevelt did not know or understand who Huxley really was and the horrific world view for which he stood. Otherwise, he would have prefaced his remarks.