Clarence Darrow and William Jennings Bryan were the two famous attorneys. Darrow was the nation's leading defense and criminal law attorney in the early twentieth century. William Jennings Bryan, was known as a famous Populist speaker, "The Orator of the Platte" and cabinet official during the Wilson presidency (1913-1920). Both men participated in the Scopes Monkey Trials in the early 1920's. This case was viewed as a fundamental test of whether of not evolution could be taught in the schools. It was named for a schoolteacher in Tennessee named William Scopes.