I would argue that basically all of the recent migrations are self-sorting: you're saying "I can't stay here out of fear for my safety" and doing something abou

I would argue that basically all of the recent migrations are self-sorting: you're saying "I can't stay here out of fear for my safety" and doing something about it by removing yourself from that situation. "Self-sorting" is almost a disservice to the amount of effort it takes to remove yourself from a suddenly created situation past your control. This is also why I hold general antipathy towards the sentiment "move back to your country"- clearly they left because something was deeply, utterly fucked. And it's awkward/cognitively dissonant to watch my family, a product of exactly this sort of immigration (context: Hungary and Russia in '55/'56) exhibit that sentiment in the modern day when people are fleeing gang violence in Guatemala and civil war in Syria.