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Political Strength: A Man’s Muscle Power Influences His Beliefs

Male Harris sparrows are pugnacious beasts. They signal their status by the darkness of their plumage, and woe-betide any male whose signal is false—for if an itinerant ethologist blackens a subordinate’s feathers, the dominant birds recognise it as a fraud and beat it up. Normally, though, behaviour and outward appearance are in alignment, having been arranged that way by evolution, and subordinate birds do not push their luck. For female Harris sparrows, however, plumage does not matter in this way. And a paper just published in Psychological Science, by Michael Petersen of the University of Aarhus in Denmark and Daniel Sznycer of the University of California, Santa Barbara, suggests that in both respects people are similar to these birds.

Dr Petersen and Dr Sznycer were investigating the idea that a person’s political opinions might be aligned with his physical characteristics. The opinion in question was whether resources should be redistributed from the rich to the poor. The physical characteristic was strength.

Poor people might be expected to favour redistribution, and the rich to be against it, regardless of how strong they were. And for women, Dr Petersen and Dr Sznycer found that this was indeed the case. For men, though, opinion did depend on strength.

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