Alot of African leaders didn't support bro. Gadhafi, did they? That is too bad if he was trying to form a United States of Africa. Divided, Africa is easy pickings for her enemies. A United States of Africa would have alot of power.
A United Africa would make everyone else look like they were playing at civilization. Its the richest continent on the face of the earth in terms of pure resources both human and natural. Just look at all the genius that comes from Africa.
Just too much...
First one has to divide the continent between Arabic and Non Arabic. 2nd most of that "genius" petered out in the middle ages, when islam was a force of maintaining the past, instead of consisting of a large religious fundamentalist contingent.
3rd, most of Africa's Resources are hard to extract.
Finally, European colonization happened other places, like India, South America, China. Those places seem far more advanced than Africa, and they got their freedom around the same time.
Subsaharan Africa has never had a unified civilization, due to the roughness of the central terrain, and a lack of a far travelling sea-going culture.