Republicans, and members of the traditionally Republican coalition like conservatives and the religious, are criticized for rejecting two main areas of science: evolution and global warming. But even those critiques are overblown. Believing in God is not the same as rejecting science, contrary to an all-too-frequent caricature propagated by the secular community. Members of all faiths have contributed to our collective scientific understanding, and Christians from Gregor Mendel to Francis Collins have been intellectual leaders in their fields. Collins, head of the Human Genome Project and an evangelical Christian, wrote a New York Times bestseller reconciling his faith with his understanding of evolution and genetics.
Numerically speaking, according to Gallup, only a marginally higher percentage of Republicans reject evolution completely than do Democrats. Yes, an embarrassing half of Republicans believe the earth is only 10,000 years old—but so do more than a third of Democrats. And a slightly higher percentage of Democrats believe God was the guiding factor in evolution than Republicans.
On global warming, conservative policy positions often seem to be conflated or confused with rejection of the consensus that the planet has been warming due to human carbon emissions. The climate trend over the last several hundred years is not one anybody credible disputes—despite the impression you might get from GOP presidential primary debates. Of the many Republican members of Congress I know personally, the vast majority do not reject the underlying science of global warming (though, embarrassingly, some still do). Even Senator Jim Inhofe, perhaps the green community’s greatest antagonist in Congress, explicitly endorses environmental regulation.
The catch: Conservatives believe many of the policies put forward to address the problem will lead to unacceptable levels of economic hardship. It's not inherently anti-scientific to oppose cap and trade or carbon taxes. What most Republicans object to are policies that unilaterally make it more expensive in the United States to produce energy, grow food, and transport people and goods but are unlikely to make much long-term difference in the world’s climate, given that other major world economies emit more carbon than the United States or have much faster growth rates of carbon emissions (China, India, Russia, and Brazil all come to mind).
The more important question on climate change is not “how do we eliminate carbon immediately?” but “how best do we secure a cleaner environment and more prosperous world for future generations?”
It is on this subject that many on the political left deeply hold some serious anti-scientific beliefs. Set aside the fact that twice as many Democrats as Republicans believe in astrology, a pseudoscientific medieval farce. Left-wing ideologues also frequently espouse an irrational fear of nuclear power, genetic modification, and industrial and agricultural chemistry—even though all of these scientific breakthroughs have enriched lives, lengthened lifespans, and produced substantial economic growth over the last century.