Book censorship in the United States On appeal, her conviction was reversed on the grounds that contraceptive devices could legally be promoted for the cure and prevention of disease. The publication of Charles Darwin's "On the Origin of Species" in 1859 "unleashed a controversy that resonates even today. In presenting a revolutionary theory of evolution, the British naturalist challenged the biblical creation story and provoked the ire of detractors who accused him of 'dethroning God'. Despite the surrounding controversy, "On the Origin of Species" remained uncensored in the United States all the way into the 1920s, when high school curricula started to incorporate the theory of
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