What were the social impacts of colonization on the African continent?

There is a great answer to a similar question pasted in
below.  One of the most powerful changes that is pointed out, has to do with the changes
in governmental structure that created legacies of ineptitude and even something called 
"kleptocracy," that became far too common on the African
continent.

The way that the imperialist powers came in and
superseded the natural progression of tribal cooperation and even at times tribal
conflicts, created a situation where everyone quickly found it more profitable to ally
themselves with the most powerful people in any situation, regardless of their
trustworthiness or their ability to produce positive effects for the society, etc.  This
has been a constant factor in much of the horrible governance and the constant coups and
other problems that have become a fixture in much of sub-saharan
Africa.