Low public acceptance of evolution among Americans in general, and conservative Protestants specifically, has recently received increased attention among scholars of both religion and the public understanding of science. At the same time, members of another major religious tradition, the Church of Jesus Christ of Latter-day Saints (LDS), reject evolution at rates similar to evangelical Christians, yet there remains a dearth of studies examining the lack of acceptance of evolution among Mormons. Using a nationally representative survey of Americans that contains an adequate number of LDS respondents for advanced statistical analyses, this study examines patterns of evolution acceptance or rejection among Mormons. Findings reveal a moderating relationship between political identity and education, such that educational attainment has a positive relationship with evolution acceptance among political moderates and liberals, but a negative association among political conservatives. These findings highlight the central role played by the politicization of evolution in low rates of evolution acceptance among American Mormons and emphasize the need to—where possible—examine relations between ‘science and religion’ within and across specific religious traditions.

Religiously conservative Americans consistently demonstrate lower scientific literacy than other Americans. Some argue, however, that Americans’ scientific literacy is contingent on subcultural conflict, showing differences in scientific literacy that emerge only on religiously contested scientific claims. Building on these insights, we find that the most salient factor explaining Americans’ divergence on contested (though not on uncontested) scientific claims is not religious commitment or conservatism per se, but an ideology that seeks political—and consequently epistemic—dominance: Christian nationalism. National data show that Christian nationalism is unassociated with Americans’ answers on questions about uncontested scientific knowledge. However, Christian nationalism is the strongest predictor of incorrect answers on questions about religiously contested scientific claims. Contemporary “culture war” debates over science have little to do with outright ignorance of science, nor are they strictly about religiosity or theological conservatism. Rather, disputes over science and religion reflect politically motivated denials of scientific facts that threaten Christian nationalism’s claims to epistemic and cultural authority.

Religiously conservative Americans consistently demonstrate lower scientific literacy than other Americans. Some argue, however, that Americans’ scientific literacy is contingent on subcultural conflict, showing differences in scientific literacy that emerge only on religiously contested scientific claims. Building on these insights, we find that the most salient factor explaining Americans’ divergence on contested (though not on uncontested) scientific claims is not religious commitment or conservatism per se, but an ideology that seeks political—and consequently epistemic—dominance: Christian nationalism. National data show that Christian nationalism is unassociated with Americans’ answers on questions about uncontested scientific knowledge. However, Christian nationalism is the strongest predictor of incorrect answers on questions about religiously contested scientific claims. Contemporary “culture war” debates over science have little to do with outright ignorance of science, nor are they strictly about religiosity or theological conservatism. Rather, disputes over science and religion reflect politically motivated denials of scientific facts that threaten Christian nationalism’s claims to epistemic and cultural authority.