04/16/2013 05:45 pm ET Updated Jun 16, 2013

Boston Marathon First Responders: When Heroes Defy Their Instincts

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Nature ought to have washed its hands of us by now, and if it hasn't yet, yesterday's blasts in Boston should have persuaded it to. It's not just that we're evil -- though we are. We build bombs, we manufacture guns, we slaughter one another with an ugly lustiness that defies the powerful social impulses that are supposed to be coded into us.

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