Tennessee v. John T. Scopes (1925)

The Butler Act (Full Text)

Tennessee House Bill No. 185 (1925), the Butler Act: "It shall be unlawful for any teacher in any of the Universities, Normals and all other public schools of the State which are supported in whole or in part by the public school funds of the State, to teach any theory that denies the story of the Divine Creation of man as taught in the Bible, and to teach instead that man has descended from a lower order of animals." Penalty: fine of $100–$500 per offense. The prosecution presents this as straightforward statutory law: the legislature enacted it, the governor signed it, and Scopes violated it. The defense challenges the Act itself as unconstitutional under the First Amendment (establishment of religion) and the Fourteenth Amendment (due process — the statute is unconstitutionally vague: what exactly constitutes "denying" divine creation?). Judge Raulston ruled the constitutional challenge out of order, holding the jury need only decide whether Scopes taught evolution, not whether the law was valid.

Hunter's Civic Biology (Textbook)

George William Hunter's "A Civic Biology: Presented in Problems" (1914), the state-adopted textbook assigned to Scopes by the Rhea County school board. Chapter 17, "The Doctrine of Evolution," states: "We have now learned that animal forms may be arranged so as to begin with the simplest one-celled forms and culminate with a group which includes man himself." The book classifies humans as mammals and traces a developmental lineage from single-celled organisms. Critically, this textbook was officially approved by the Tennessee Textbook Commission and purchased with state funds — creating a paradox where the state simultaneously required teachers to use the book and prohibited them from teaching its contents. The prosecution argues the book's content is irrelevant to the legal question (did Scopes teach evolution — yes or no); the defense argues the state cannot punish a teacher for teaching state-mandated curriculum, and that the contradiction demonstrates the Act's absurdity.

Scopes's Classroom Records

School attendance records from Rhea County Central High School and Scopes's lesson planning notes confirming he taught Chapter 17 (evolution) to his biology class of 14-to-17-year-old students during the spring 1925 semester. Seven students provided statements that Scopes reviewed the chapter with them. However, a critical evidentiary issue exists: Scopes later privately admitted he may not have actually taught the lesson himself — he was primarily a physics teacher and football coach who substituted in biology, and he was uncertain whether he covered evolution or merely assigned the reading. The case was a deliberate test case organized by Dayton civic leaders and the ACLU; Scopes volunteered to be the defendant. The prosecution treats this as a simple factual exhibit proving violation; the defense argues the records show only that the textbook was assigned, not that Scopes personally "taught" evolutionary theory as the statute requires.

Affidavits from Eight Scientists (Defense)

Written affidavits from eight expert witnesses including: Dr. Maynard Metcalf (zoologist, Johns Hopkins), Dr. Winterton Curtis (biologist, University of Missouri), Dr. Fay-Cooper Cole (anthropologist, University of Chicago), Dr. Horatio Newman (geologist), and others. The scientists attested that evolution is the universally accepted framework of modern biology, supported by fossil evidence, comparative anatomy, embryology, and genetics. They argued that evolution does not necessarily deny divine creation — many scientists reconcile evolution with religious faith (theistic evolution). Judge Raulston ruled that live expert testimony was inadmissible because the only legal question was whether Scopes violated the statute, not whether evolution was true. He allowed the affidavits entered into the record solely for appellate purposes. The defense argued this ruling gutted their constitutional challenge: if they cannot present scientific evidence, they cannot prove the Act unconstitutionally restricts established science. This exclusion is a key pretrial motion issue — whether expert testimony on the truth of evolution is relevant to the case.

Transcript: Darrow's Cross-Examination of Bryan

In an extraordinary and legally unprecedented move, defense attorney Clarence Darrow called prosecutor William Jennings Bryan as a hostile witness and "expert on the Bible." The examination (conducted outdoors due to heat) lasted two hours. Key admissions extracted by Darrow: Bryan acknowledged that a "day" in Genesis might represent a period longer than 24 hours ("It might have continued for millions of years"); he could not explain where Cain's wife came from; he admitted he did not interpret all Biblical passages literally (the sun standing still for Joshua). Bryan grew increasingly flustered and stated: "I do not think about things I don't think about." Darrow replied: "Do you think about the things you do think about?" The prosecution moved to strike the entire examination from the record, and the judge sustained the motion — but the transcript survived as a public record and devastated the literalist position in the court of public opinion. Its admissibility as evidence is questionable: can a party be compelled to serve as expert witness on a religious text? Does this violate the opposing counsel's role?