Reactions to On the Origin of Species Catholic discussion of evolution, which has remained almost exclusively concerned with human evolution. On 10 February 1860 Huxley gave a lecture titled "On Species and Races, and their Origin" at the Royal Institution, reviewing Darwin's theory with fancy pigeons on hand to demonstrate artificial selection, as well as using the occasion to confront the clergy with his aim of wresting science from ecclesiastical control. He referred to Galileo's persecution by the church, "the little Canutes of the hour enthroned in solemn state, bidding that great wave to stay, and threatening to check its beneficent progress." He hailed the "Origin" as
On the Origin of Species to Races of Man", but did not add text on this topic. In "On the Origin of Species", Chapter VI: "Difficulties on Theory" Darwin mentions this in the context of "slight and unimportant variations": I might have adduced for this same purpose the differences between the races of man, which are so strongly marked; I may add that some little light can apparently be thrown on the origin of these differences, chiefly through sexual selection of a particular kind, but without here entering on copious details my reasoning would appear frivolous." When Darwin published "The Descent of Man, and Selection