To quote a famous comedian:
"We spend all this money sending truckloads of food to starving people in Africa. But have you looked at the land? A million years ago it was sand! A million years from now it'll be sand! Stop sending food in trucks, send the trucks, fill them with people and take them to where the food is!"
I have mixed emotions on this one. I don't think we should be the world's food pantry any more than we should be the world's police force. But there are 2 reasons that I think Africa could use our help:
A) Long-standing ethnic wars are the hardest things to get rid of. It usually takes someone who comes in and takes all the children away/forcibly re-educates all the children to get it to die. Just look at Israel and Palestine. That's been going on how many hundred years now?

And if nothing else, while we're pissing off the rest of the world, why not stop a war while we're at it?
B) I'm not trying to start a slavery debate here, but the period where Europe and the US were importing slaves really demolished the established cultures of Africa. Bear in mind, Africa had her own large cities and grand cultures, many of which we've either never learned about or have forgotten. Egypt is in Africa. Timbuktu was a great trade city, not just a far away place. (Current American English usage) There is WAY more to it than just jungles, elephants, natives and the pith-helmeted English hunters.
"The Atlantic Slave Trade had enormous negative effects on the continent of Africa. As was mentioned above in regards to the Kongo Kingdom, many parts of Africa suffered from an increase in violence, drain of people, and an economy increasingly reliant on slavery. Over four hundred years of slave trade had transformed the African Continent from coastal regions (where most of the trading with Europeans took place) all the way to the interior of Africa (where many slaves were captured to be sold.) Despite the tremendous consequences of the Atlantic Slave Trade on Africa, Africans still continued to make important progress during this time in areas such as literacy, metal working, and textile production. However, there is no doubt that the Atlantic Slave Trade changed the face of the earth in many ways and presented a huge challenge to Africa in trying to recover from this brutal period of her history."
http://exploringafrica.matrix.msu.edu/c ... tyone.html is a really good place for starters to go explore the history of it.
*shrug* As far as I know, all my ancestors were too far north in Europe to have anything to do with the slave trade, and are fairly recent to America, so we weren't around for slavery's heyday. But I feel .... I guess somewhat guilty having grown up in America and slowly becoming aware that much of the history and infrastructure I take for granted was created by hurting these other people. (And no one'll teach you that part in school!)
To sum up: I think the situation in Africa has grown beyond the ability of the US to fix or even allieviate. However, I feel we still share some responsibility for it, and have a duty to keep trying to help, even if we can't help on as grand a scale as we used to. (I admit, I'm 24, young and naive. Any voices of experience who want to add new info to change my mind?)