I, until very recently, believed that there were two types of people in this world – those who accept the theory of evolution and those who do not understand the theory of evolution. In my mind, it was impossible to be presented with the overwhelming evidence for and beautiful simplicity of The Theory and not be convinced. Yet, a small, informal survey of sophomore-ish biology majors here at LSU revealed only 35% responded with “Evolution” to the question: What are your feelings/beliefs about how we, as humans, came to exist on Earth? To be fair, the highest category was “Some mix of evolution, creationism and intelligent design”, which really means only 23% of respondents did not include evolution. These numbers are much better than our national average: Miller et al. (2006) conducted a multinational survey that showed nearly 40% of Americans deem evolution “false”. This makes us second from the bottom (out of 34 countries!) in acceptance of evolution – right below Cyprus and above Turkey.
As it turns out, I have overlooked a third type of person: a person who can be exposed to a well-supported argument for an uncontroversial scientific consensus and reject it. These people are a major source of science denial. Rosenau (2012) published an amazing and concise review this week in Trends in Microbiology that discusses science denialism and how it’s more about identity and social groups than scientific facts.