So, here’s a thing:
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This relates to a criticism that I made of evolutionary psychology, but which applies to many naive adaptationist arguments: it is easy to come up with a plausible-sounding adaptive explanation of just about anything. In most cases, it is equally easy to come up with an equally plausible-sounding explanation of the exact opposite phenomenon.
Barnett AG, Plonka K, Seow WK, Wilson LA, & Hansen C (2011). Increased traffic exposure and negative birth outcomes: a prospective cohort in Australia. Environmental health : a global access science source, 10 PMID: 21453550