1925, Tennessee, The Butler Act-
"This law outlawed the teaching of evolution as the descent of man from lower animals. As the most famous example of early anti-evolution legislation, it also provides us with information about what really bothered the anti-evolutionists: the teaching of the continuity of descent of man from non-human primates. This is the real issue that all later legislation would like to address, but does so only obliquely.The Butler Act was the statute under which John T. Scopes of Dayton, Tennessee was charged, leading to the famous Scopes Monkey Trial.
The Butler Act was upheld on the legal issues raised in Scopes' appeal, but the court reversed Scopes' conviction on the technical issue (not raised by the defense) that the fine had been set by the judge and not the jury. The appeals court further requested dismissal of the case by the prosecution, which complied. With no grounds to move the case to a higher court, the Butler Act remained the law of Tennessee until 1968."
The USA has had a long and complex history of anti-evolution measures proposed and sometimes passed at the state level.In the 1920's when urbanization was occurring and rural areas felt threatened by the new technology, advancements, and discoveries, they did not want such things introduced into their small towns and traditional ways of life. They did all that they could to prohibit this kind of education from being introduced.