No, it isn't. This is an incredibly modern phenomenon. We see examples of peoples moving en masse throughout history, yes, but the idea that everyday individuals should expect to leave their community is an incredibly recent one. Such would have seemed monstrous to people even a few hundred years ago. Fun fact: Socrates wasn't actually sentenced to death, he was sentenced to death or exile, and chose death over having to leave his home behind.

> Millions of people migrate every year today

A just society that doesn't force them to.