Darwin's use of the word "races" was the common lingo of the time to describe different species. In fact, in the book you have never read, he discusses "races" of trees, birds, and barnacles. [excerpt]Nice whitewash job.
How about this gem:
Thomas Henry Huxley, a close personal friend of Darwins and an indefatigable champion of evolution (who frequently referred to himself as “Darwins Bulldog” opined,
No rational man, cognizant of the facts, believes that the average Negro is the equal, still less the superior, of the white man. And if this be true, it is simply incredible that, when all his disabilities are removed, and our prognathus relative has a fair field and no favour, as well as no oppressor, he will be able to compete successfully with his bigger-brained and smaller jawed rival, in a contest which is to be carried out on by thoughts and not by bites.”