The basic problem of Africa is that the market value of the average African's productivity has become less than the cost of feeding them, and the first world has run out of spare cash to subsidize them due to our own experiments with socialism.
The world can no longer afford to feed the unskilled.
In another generation, two at the most, they will have eaten their way through every herd of moving creatures on the continent.
The only place our posterity will see giraffes, elephants, rhinos, hippos, etc. is in old movies and perhaps a few zoos and tourist attractions.