I was afraid of that...

I thought that's what you might be reading into Eco's remarks, but I was hoping it wasn't. That's why I went down the path of the ghettos.

Eco isn't saying migration is an inevitability. He is saying that when it happens, the consequences are constant and inevitable. He is also illustrating what distinguishes it from immigration. Empires and kingdoms have existed for centuries and have not fallen prey to migrations until after they collapsed. That alone disproves any notion of the inevitability of migration.

We stand on the cusp of the choice between migration and immigration. I think Vox believes we may have tipped over into the former already, which would invoke Eco's consequences. I don't know that I believe that. Vox asserts that the governing bodies don't have the will to reverse the potential for migration. I'm not so sure. Europe is beginning to realize their situation, but it might be too late for them. They embraced the notion of multiculturalism completely, opening wide the doors for migration. The US has been more reticent about wholesale multiculturalism. It might not be too late.

As for what we do if we are in the midst of a migration, I agree with Eco and Vox: nothing. There is little we can do about it. The US will become a third-world socialist hellhole with affluent Whites and Asians fleeing for high ground. Who knows where they'll go? Maybe places like Costa Rica where capitalism and libertarian principles are at least still breathing. Maybe somewhere else. Maybe that group will retreat to some defensible North American territory and secede from the US. There would certainly be little enough that Brown America could do about that.