A recently published study finds that genes may account for a significant amount (41%)of how we react to policy issues; genetics was less important in determining political party affiliation (14%).
In a conclusion similar to that in the infamous Bell Curve, where intelligence differences between segments of the population were forecast to increase because of "tribal intermarrying," the authors are not optimistic about the future of bipartianship.
It's a fascinating study and you should probably read Tyler Cowen's comments @ Marginal Revolution (thanks for the pointer) on the way there.
UPDATE: The folks at the New York Times have picked up this story: Some Politics May Be Etched in the Genes
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