Here's my evil, racist take on the matter. You can help some nations, but you cannot help others. Some people, whether it is by their limited intelligence or by the suffocating influence of their culture or religion, unable to build a productive society. A good example: in the early 1950s, South Korea and Uganda were equally poor. Since then, Uganda has received more aid from abroad than South Korea. But because (1) it is part of the Korean culture to want to work hard and build a functioning, orderly society and (2) the IQ of the average Korean is at least a good twenty-five points higher than the IQ of the average Ugandan, North Korea is much more developed than Uganda and South Korea is one of the most developed countries on earth.

As for the culture that is prevalent in Sub-Saharan Africa, I don't expect much. All of the economic growth in that part of the world is either because of sheer population explosion or because of foreign aid and remissions from migrants living in Europe. And what little economic prosperity and social order there is now will most likely be shattered within one or two decades, in another round of bloodshed. Look at Nigeria, for example, the largest African country by population. People have had to temper their enormously optimistic beliefs about Nigeria because there's the religious unrest that no one but hardcore racists like myself would have been able to predict. Two groups of people fight in an African country, and the result is more political unrest and therefore another cycle of violence - who would have thought?