I'm not sure whether you are aware that you changed the argument. Op was describing the effect of colonialisation on DRC. S/He wasn't discussing the impact of s

I'm not sure whether you are aware that you changed the argument. Op was describing the effect of colonialisation on DRC. S/He wasn't discussing the impact of slavery. There were also different kinds of colonies and different ways of looking at things. Sure the US turned out fine. Other countries in the region less so. But also it's the US if today that's doing fine and you seem to overlook the rather great effect colonialisation in North America had on the natives there. They were all but wiped out and certainly, overall, are not in a great spot today. It's easy to find many different things today. The direct and still clearly visible effects of colonisation are without doubt one of the many factors that kept much of Africa in the suffering state that we still see today. There is no denying this fact and no matter how many other reasons you find, colonialism is still one of the most significant reasons for the African misery, as it set in motion many horrible things.