

Probably when those similar interest people over why geographic areas started creating religions, wars countries that caused wars probably a good bit of racism as a treat.
Generally speaking, when humans tribalize good things do not happen to those not in the tribe.
There are exceptions and sometimes the good things the tribes make for the tribes. Get shared with other tribes.
But for the most part, it’s never a good thing.
Almost no one understands email I would be surprised if the number is higher then 7 or 8 percent of users that use email understand what it even is beyond the basic statement of “it’s like a letter”.
People barely understand how mail works in the first place.