>>667374Dude, some hundred years ago the irish were considered primitive dolts unfit to mix and live together with other civilized folk, and now the thought of it is absolutely absurd.
Humanity groups itself by instinct, but in _what kind of group_ is up to you. You could have white and black people in groups shouting like mad at eachother, but then you add a conflicting factor to it, let's say someone of another religion or lacking religion, and suddenly the blacks and whites gang up on this new person, or split into groups depending on religion instead.