In his book “The Righteous Mind,” moral psychologist Jonathan Haidt writes about “groupishiness,” the innate tendency of humans to lump themselves together based on likes or dislikes, similarities in culture or appearance, hobbies and habits, and more. It’s a different way of saying, “birds of a feather flock together.”
It’s natural and normal to tend to congregate with those with whom you have things in common. It’s how we create social groups and come together…