> These findings contradict the commonly-held idea that killing is an 'unnatural' act for humans that inevitably inflicts a moral injury on the individual, the researchers write in Armed Forces and Society.

> "There is a widespread belief in society that taking the life of another person goes against human nature, and that this will easily create what psychotraumatology refers to as 'moral injuries'," said Nordstrand in a press release.

I had not thought that that belief was anywhere near as common as this seems to suggest.