I’m going to take a stab at this. One of my favorite economists is Dambisa Moyo. I am going to take a stab at this and see what she thinks.
Is this a chicken vs. egg argument? What I mean by this is as follows: Is violence in places such as Central African Republic and South Sudan holding African development back? Would economic development stop, or at least stem, some of the violence.
People tend to act for their own selfish interests. Can other countries form a consortium along with France to go into the Central African Republic and South Sudan and end their endemic violence in exchange for mineral rights for example.
This is not an idea to return to colonialism. Colonialism caused enough issues in modern African to not want that. It means not charity, but working with local people and doing a whole lot of listening, a lot less talking and a lot more action. (I borrowed the last line from a country song).