The Cultural Correlations for Darwinism vs. Creationism
The cultural correlations for Darwinism vs. Creationism (recently discussed by TJIC) don’t fit very well. In a rational world, you would expect the Darwinian believers to have large families, to disapprove of homosexuality or euthanasia, and to be skeptical of central planning (also, see this blog).
On the other hand, the correlations fit Malthus (Darwin's predecessor) vs. cornucopians very well. It looks like Darwinism inherited the Malthusians.
Addendum: The phrase “Darwinian believers” might need an explanation. When people who know almost nothing else about science are convinced of the truth of Darwin's explanation of evolution, they're taking it on faith.