Perhaps the Solution is Lots of Water?

Many see the reason for the USA being able to succeed and prosper as no other civilizations, is that most of the immigrants coming here were separated by the Atlantic Ocean from their Tribal customs and Territorial links, and without those negative influence land connections were better able to assimilate with people with differing languages and from differing lands.

Yes there were conflicts, however it was neutral ground and turf battles were relatively minimal.

Neutral for all but the Native Americans who continued on suffering from Tribal customs and Territorial connections, which weakened their ability to resist the immigrant invaders. Simple enough, divided they fell!

Therefore, what we need do today is relocate all those persons of Mexico and Central America who are unhappy with their circumstance to the Middle East, and on return bring all the Middle Easterners who are unhappy back to Mexico and Central America.

We can call the activity Water Abroading and the purpose is to give them a fresh start.

My bet is, that by the time they commonly recover from the change of climate and lifestyle their old divisions might be of lesser concern and they begin working together in creating something similar to what we once had in the USA.

But then, in 200+ years everybody will again need to be relocated back from where their ancestors originated. The reason is the descendants of the original migrators will have lost any appreciation for what they then enjoy, greed and lust for power will overtake them and that will destroy any positive benefit of the earlier efforts.

Then it will be time to start over, again!