Science Health & Safety National Loyalty to groups helped humans survive. That instinct still shows up in conflicts 6:21pm October 30, 2023 by Yuki Noguchi Share URL copied to clipboard! Play Pause There was an error loading the media player. Copyright 2023 NPR. To see more, visit https://www.npr.org. 300x250 Ad More All Things Considered National NJ Attorney General joins suit to stop Trump's federal grant freeze Economy National Trump invites nearly all federal workers to quit now, get paid through September 300x250 Ad Support quality journalism, like the story above, with your gift right now. Donate
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