The opportunity to travel here, learn, and bring back what is best in our culture would unleash the human potential of people now living with ignorance and disease. Most third world nations remain impoverished and oppressed because they are ruled by dictators with no concept of freedom or democracy. Our reluctance to identify the cause of their problems helps keep these people starving and enslaved. Sending military forces abroad reinforces their dependency and hopelessness and destroys their cultures by transplanting the worst of ours. How to function in a dictatorship.
Subsistence farming is common there but almost forgotten here.
It is a skill we may have to relearn if our market economy is so disabled that it can no longer provide for our necessities. Many of the most successful and prosperous nations are not self-sufficient in food or other basic necessities. But if this is what the people desire they can achieve it most quickly by massive deregulation within their own borders. All over the world there are farmers who know how to farm and petty tyrants who kill them when they try. Most third world nations could export food if they were not ruled by dictators who were intent on controlling the food supply to control the people.