Why are they so many dictators in Africa?

Sadly, African people are easily led, they are longing for a better life with jobs, a decent home and education for their children. Along comes a power hungry 'leader' who promises all those things, yet fails to deliver when he gets into power. They are disillusioned but the promises keep coming and the dictator gets voted back into power After blaming the colonialists for their dilemma, years after the country has Independence, they resort to coercion and violence to keep the populace voting them into power. Zimbabwe is a prime example.