Is your political ideology...

...determined by your genes? (I mentioned this last week here.) 

That's what Sasha Issenberg asks in "Born This Way: The New Weird Science of Hardwired Political Identity." From New York magazine (my emphasis): 

If genes can make someone more prone to depression or bad temper, why couldn’t they also explain his political views?
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“As a general rule,” the authors wrote, “liberals are more open-minded in their pursuit of creativity, novelty, and diversity, whereas conservatives seek lives that are more orderly, conventional, and better organized.” Rare midlife conversions aside, our parties are groups of two different kinds of people, they said, divided not by class or geography or education but by temperament.
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They found that even in nursery schools, liberals had been self-reliant and resilient, able to develop close relationships and willing to easily cast off routine. The conservatives had been distrustful of others and anxious when facing uncertainty, quick to take offense and experience guilt.
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Conservatism might not be that thing defined by William F. Buckley or Edmund Burke but a primal condition by which people hedge against disorder or change they can’t otherwise control.