What can we not look at as being a reason for the struggles of the continent of Africa?

Mixed nations and borders

The legacy of imperialism

Poverty

An economy based on imports

Mixed nations and borders. You can use the question itself to get the answer, since imperialism left such a strong legacy in africa, the borders were so defined and the natives were forced to abide by them. So there is no reason for there to be any confusion about what is where.