Launch a US citizen website where immigrants can register to become a US citizen then they can stay in their country as US citizens and recruit more US Citizens in their country.
Then you will have a new country of US Citizens changing their old country from the inside. The solution is to export the American idea to those who want it and clone countries into American territories. By giving people the freedom tools they need to foster a new nation under the U.S. Constitution.
This can be done on facebook by the white house and congress because it will not affect our homelands negatively. There will be less immigration and more goods, services and tax payers.
The biggest obstacle is most likely the political and social, etc. problems in some of these countries but it should not matter in the face of what works and what is wanted by people which is what everyone wants is a better life?
Freedom is not about location it is about ideas, work and sacrifice.
Why not bring America to them who wants to immigrate to America?
In the end it may require more effort to change the political social climate of some nations but in the end and over time this could work with help from friends.