The Creation Research Society (CRS) is a Christian fundamentalist group that requires of its members belief that the Bible is historically and scientifically true in the original autographs, belief that "original created kinds" of all living things were created during the Creation week described in Genesis, and belief in flood geology. The organization has produced various publications describing what it calls creation science, including a journal and a creation-based biology textbook; use of the textbook in public schools was ruled unconstitutional in Hendren v. Campbell. During the first few years of its existence, different beliefs about Creationism and disagreement over its statement of beliefs resulted in various members of the CRS board and voting members being forced out of the organization. History Formation Walter E. Lammerts formed the organization in the 1950s after becoming concerned that the American Scientific Affiliation was falling under the influence of theistic evolution. It was originally named the Creation Research Advisory Committee in February 1963, and headed by Walter E. Lammerts and William J. Tinkle with assistance from Henry M. Morris. The committee originally consisted of ten creationists: Lammerts, Tinkle, Morris, John W. Klotz, Frank Lewis Marsh, Edwin Y. Monsma, Duane Gish, Wilbert H. Rusch, John J. Grebe, and R. Laird Harris. The CRS was later formed in June 1963, with the original advisory committee constituting the new society's 'steering committee', with Karl W. Linsenmann, David A. Warriner and John N. Moore joining it at that time. At about the same time, Morris recruited Harold Slusher, Thomas G. Barnes, Willis L. Webb and later Clifford L. Burdlick. Finally, Paul A. Zimmerman joined it. By the end of the year had expanded to approximately fifty members. Members with at least an M.Sc. or equivalent were eligible to be voting members. Textbook project In response to the Sputnik-inspired emphasis on science education, and the resultant Biological Sciences Curriculum Study textbooks (which emphasised evolution for the first time), creationists in the early 1960s were searching for an orthodox and up-to-date creationist biology textbook. The CRS responded with Biology: A Search for Order in Complexity, published in 1970 by Christian publisher Zondervan, which was a mixed success, selling out its first run of 10,000, and being approved by a number of state textbook committees but being adopted by few public schools. After an Indiana school attempted to make exclusive use of it, a state court ruled that its use