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Certainly, it would be foolish to argue that epigenetics are a bigger piece of the puzzle than environment alone. But, I think that Lamarkian evolution has found a place in epigenetics, and Lamarkian evolution, while subtler, can work orders of magnitude faster than its Darwinian cousin. I would be surprised if epigenetics played no role in culture formation. It has been shown that epigentic changes can predispose rats to aggression. It stands to reason that the opposite could be true. The less war-like we become, the less-warlike our progeny may be. Hence, we can build bridges (literally and figuratively).