> And the migrant crisis, which is likely only at its beginning (look at african demographic projections)
African demographic projections which shows Africa's population growth slowly dropping? Coupled with economic projections which shows most African economies growing at far faster rates than Europe? With some African countries, like Nigeria, likely to overtake the UK in total GDP (not per capita) over the next 20-30 years? Largely as a result of massively improved stability and fewer wars over the last decade.
Africa has plenty of challenges, but they're mostly headed the right way. And they're also slowly but steadily moving towards a far more ambitious union project than the EU, with several of the African Union pillars (regional closer unions like ECOWAS serves as "first stage" integration) hard at work at monetary unions and extensive integration.
Of course things can change - nobody expected Syria to blow up the way it did and more than we expected Yugoslavia to collapse as violently as it did.
But at the moment, countries like Nigeria are seeing graduates etc. returning in droves from the UK because the opportunities there are immense, cost of living low (though housing prices in parts of places like Lagos can rival London) and growth at levels you can't hope for in the UK.