Safety in Numbers: the hypothesis that, by being part of a large physical group or mass, an individual is less likely to be the victim of a mishap, accident, attack, or other bad event.
(you guessed it, this is very hardly about the Denver Nuggets. Proceed at your own risk.)
It’s an ancestral thing, if you listen to certain psychologists. We gather together to feel more safe. At home. Amongst our own. To be with the people with whom we feel more alike than different. Because different makes us feel weird. Different can even be scary.