Think of it as an international public works program.  Think of it as an army of builders as opposed to an army of destroyers.  Think of it as an army of tractors and cranes to balance our army of tanks and cannons.  

We have the Peace Corps, which is mainly grass roots, and we have the military, which has the bulk of the funding and technological bells and whistles.  What if we had an army of builders, well equipped, well organized, and well funded that can serve as the carrot to the military's stick on the international front?