Scopes Trial: In Dayton, Tennessee, high school biology teacher John T. Scopes is found guilty of teaching human evolution in class and fined $100.

The Scopes Trial of 1925 was a landmark legal case in Dayton, Tennessee, centered around high school teacher John T. Scopes, who was accused of violating the Butler Act—a Tennessee law prohibiting the teaching of human evolution in public schools. This case was never just about a teacher and a textbook. It became a flashpoint in the national debate between modern science and religious fundamentalism. Scopes, backed by the American Civil Liberties Union (ACLU), had knowingly incriminated himself in order to bring the issue to court.

What made the trial especially gripping was the legal showdown between two famous figures: Clarence Darrow, a renowned defense attorney and agnostic, and William Jennings Bryan, a three-time presidential candidate and evangelical Christian, who assisted the prosecution. The courtroom became a stage for a broader ideological battle. Darrow’s sharp cross-examination of Bryan—questioning his literal belief in the Bible—exposed the tensions between faith and reason, tradition and progress. The trial was one of the first to be broadcast on national radio, turning it into a media spectacle and cultural event that captivated the entire country.

Although Scopes was found guilty and fined $100 (later overturned on a technicality), the trial’s lasting impact was symbolic, not legal. It spotlighted the deep cultural divides in America—particularly in the South—about science, education, and religion. More than anything, the Scopes Trial laid the groundwork for future legal and educational battles over curriculum content and freedom of thought. While evolution would continue to face opposition, the trial galvanized public discourse and helped push scientific perspectives into the educational mainstream.