It might not be PC to make this observation but in sub Saharan Africa the minute the English/Germans/Dutch/et al left, the Africans went right back to eating each other. They practice genocide along tribal lines and extract retribution over slights, real and imagined, from 100 years ago. They have to pay exorbitant wages to lure non-african professionals into the country to keep their infrastructure from totally collapsing. The aid we sent them is often pocketed and the food and goods we sent them is often repackaged and sold on the world market and the money pocketed by the despot ruler. And used in part to pay his elite guard, finance his life style, and fatten his Swiss bank account while people starve in the streets.
Their best and brightest they send abroad for educations at some of the best universities in the world and few of them return. I mean, would you?