Source, chart created by me.
I understand when groups of people disagree about values issues like abortion, gay marriage, or government spending. I'm frustrated that we can't agree on factual issues even when evidence abounds.
Regarding evolution, you have to be an idiot or completely uninformed to believe that "humans have existed in their present form" since the beginning rather than believing in evolution by either naturalistic or theistic causes.
The case for global warming is less solid than that for evolution, but there's no rational reason people should be split on the issue by political party. 23% of Republican vs. 75% of Democratic college grads believe in it!
On both issues, Democrats are significantly more likely than Republicans to be factually correct.
Evolution speaks for itself for the majority of my readers, but if they haven't looked into global warming, they may not have realized how strong the case is:
The scientific consensus is clearly expressed in the reports of the Intergovernmental Panel on Climate Change (IPCC). Created in 1988 by the World Meteorological Organization and the United Nations Environmental Programme, IPCC's purpose is to evaluate the state of climate science as a basis for informed policy action, primarily on the basis of peer-reviewed and published scientific literature (3). In its most recent assessment, IPCC states unequivocally that the consensus of scientific opinion is that Earth's climate is being affected by human activities: "Human activities ... are modifying the concentration of atmospheric constituents ... that absorb or scatter radiant energy. ... [M]ost of the observed warming over the last 50 years is likely to have been due to the increase in greenhouse gas concentrations" [p. 21 in (4)].
IPCC is not alone in its conclusions. In recent years, all major scientific bodies in the United States whose members' expertise bears directly on the matter have issued similar statements. For example, the National Academy of Sciences report, Climate Change Science: An Analysis of Some Key Questions, begins: "Greenhouse gases are accumulating in Earth's atmosphere as a result of human activities, causing surface air temperatures and subsurface ocean temperatures to rise" [p. 1 in (5)]. The report explicitly asks whether the IPCC assessment is a fair summary of professional scientific thinking, and answers yes: "The IPCC's conclusion that most of the observed warming of the last 50 years is likely to have been due to the increase in greenhouse gas concentrations accurately reflects the current thinking of the scientific community on this issue" [p. 3 in (5)].
Others agree. The American Meteorological Society (6), the American Geophysical Union (7), and the American Association for the Advancement of Science (AAAS) all have issued statements in recent years concluding that the evidence for human modification of climate is compelling (8).
Can anyone think of a factual issue that Republicans are significantly more likely to be correct on? Please provide data.