Stranger at the Door

Stranger at the DoorCan We Live in "e;Us Versus Them"e;?Every day we open a door to strangers.Sometimes they stand on our porch. More often they appear on our television screens, social media feeds, political debates, neighborhoods, workplaces, and even around our own dinner tables.Why do we so quickly divide people into "e;us"e; and "e;them"e;?Drawing on psychology, neuroscience, history, and a l...