Causes and effect of coup de' tat in africa?

There have been a number of coup d'etats in Africa. Generally the causes for them were lust for power on the side of the people who have conducted them and/or dissatisfaction with the previous government.

the effects of coup d'etats was the political de-stabilisation of the region and the tendency for authoritarian rule..

It is meant that like tapestry scientific theories often need to pull out since they are not relevant and often times the whole chain of theories may be pulled out.