Your great-great grandparents tried that already. They rebelled and ultimately broke/removed everything you guys built there. Unless you want to just eradicate the locals from entire sections of Africa, I highly doubt any sort of European building is going to survive.
What is wrong in letting them deal with their own situation? Are you really that disappointed with the under utilization of Africa's resources that you are willing to invest Europe's resources to get involved and try to create order in a region that really has no economic nor security threat to you?
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