By the terms of the statute, it could be argued, it was not illegal to teach evolution in respect to non-human creatures, such as that apes descended from protozoa or to teach the mechanisms of variation and natural selection. The bill also did not touch on, or restrict the teaching of prevailing scientific theories of geology or the age of the Earth. It did not even require that the Genesis story be taught, but prohibited solely the teaching that man evolved, or any other theory denying that man was created by God as recorded in Genesis. However the author of the law, a Tennessee farmer and member of the Tennessee House of Representatives John Washington Butler, specifically intended that it would prohibit the teaching of evolution. He later was reported to have said "No, I didn't know anything about evolution when I introduced it. I'd read in the papers that boys and girls were coming home from school and telling their fathers and mothers that the Bible was all nonsense." After reading copies of William Jennings Bryan's lecture "Is the Bible True?" as well as Charles Darwin's "The Origin of Species" and "The Descent of Man", Butler decided the teaching of evolution was dangerous.