(For previous posts in this series, see here.)
The 1968 Epperson ruling left open the question of what should be done about the teaching of some scientific theory that went clearly went against a religious belief. Wouldn’t allowing the teaching of just that theory without balancing it with the teaching of the religious belief violate the strict neutrality, as required by the 1947 Everson verdict?
The concerns raised by Supreme Court Justices Black and Stewart in Epperson were good ones and it was another case in 1971 Lemon v. Kurtzman, 403 U.S. 602 that, although not dealing directly with the teaching of evolution, led to further clarification of this tricky issue and lay the groundwork for future evolution cases.
The Lemon case arose from two separate laws bundled together. One was passed in Rhode Island that provided “for a 15% salary supplement to be paid to teachers in nonpublic schools at which the average per-pupil expenditure on secular education is below the average in public schools. Eligible teachers must teach only courses offered in the public schools, using only materials used in the public schools, and must agree not to teach courses in religion.” The second law was passed in Pennsylvania and authorized “the state Superintendent of Public Instruction to “purchase” certain “secular educational services” from nonpublic schools, directly reimbursing those schools solely for teachers’ salaries, textbooks, and instructional materials. Reimbursement is restricted to courses in specific secular subjects, the textbooks and materials must be approved by the Superintendent, and no payment is to be made for any course containing “any subject matter expressing religious teaching, or the morals or forms of worship of any sect.” ”