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The evolution of antievolution policies

December 17, 2015

KNOXVILLE -- Organized opposition to the teaching of evolution in public schools in the United States began in the 1920s, leading to the famous Scopes Monkey trial. It continues today, but has evolved significantly from the outright bans.

In a new study from the National Institute for Mathematical and Biological Synthesis (NIMBioS), the evolutionary history of antievolution efforts in state legislatures is statistically reconstructed in a phylogenetic tree to reveal the genealogical relationships among lawmaking efforts over the past decade.

The study sheds light on the strategies used by creationists to influence the way biology is taught in the classroom.

While US courts have consistently ruled that teaching explicitly religious alternatives to evolution, such as creation science or intelligent design, violates the US Constitution, creationists have continued to fight legal and political battles to undermine the teaching of evolution.

The study, published today in the journal Science, shows the detailed 'family relationships' of antievolution legislation in the US from 2004 to the present. The phylogenetic analysis tracks the copying and modification of the text of the legislative proposals over the last ten years, which total 65 bills.

In 2004, antievolutionist legislation began to shift tactics due to likely challenges to the constitutionality of 'intelligent design.' In the 2005 Kitzmiller v. Dover decision, a federal court held that teaching intelligent design in the public schools was unconstitutional, and afterwards, policies encouraging 'critical analyses' of evolution and other topics became dominant.

The study shows the origin of this now-common tactic of urging a critical approach in antievolutionist language in the bills.

"The strategy of encouraging 'critical analysis' of not just evolution and origin-of-life studies, but also of human cloning and global warming was essentially invented in a 2006 school board policy passed in Ouachita Parish, Louisiana. This combination proved popular, and legislative bills using this tactic have since been proposed in many states, and were passed in Louisiana and Tennessee," explained lead author Nick Matzke, a former NIMBioS postdoctoral fellow and now a fellow at the Australian National University.

The study also found that antievolution bills show evidence of 'descent with modification,' suggesting that anti-evolutionist legislators copy bills recently proposed or passed, rather than writing new bills from scratch. In addition, although the antievolution bills usually avoid mentioning creationism, most could be tied directly to creationism through statements in the legislation or by the bills' sponsors.

"Creationism is getting stealthier in the wake of legal defeats, but techniques from the study of evolution reveal how creationist legislation evolves," Matzke said.
-end-
Citation: Matzke, NJ. The evolution of antievolution policies after Kitzmiller v. Dover. Science. [Online]

Photo Caption: Teachers at a workshop learn new tips for teaching evolution. A new study reveals strategies used in state lawmaking to influence the teaching of evolution in public schools.

Photo Credit: NIMBioS

The National Institute for Mathematical and Biological Synthesis is an NSF-supported center that brings together researchers from around the world to collaborate across disciplinary boundaries to investigate solutions to basic and applied problems in the life sciences.

CONTACT:

Nick Matzke
nick.matzke@anu.edu.au
61-0410-726-191
Australian National University

Catherine Crawley
ccrawley@nimbios.org
865-974-9350
NIMBioS

National Institute for Mathematical and Biological Synthesis (NIMBioS)

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