Teach for America or Peace Corps? Who needs more help?

Both the Peace Corps and Teach for America do great things. The question is whether to help at home or abroad? The answer is easy for me. We have great school systems and a great economy (compared to many in the world) but there are still problems and poverty in the U.S. but when juxtaposed against the rest of the world...we are extremely privileged on the whole. I would choose to join the Peace Corps. My heart breaks for others who battle disease, poverty, starvation and political unrest and corruption is other parts of the world. I'm not saying individual people don't matter and that I'm leaving my homeland to fend for itself, it's just that overall...others just need more help. I feel a duty not only to my country but to the global community and to humanity.