African poverty was not caused by colonialism, capitalism or free trade. As I have noted before, many of Europe's former dependencies became rich precisely because they maintained many of the colonial institutions and partook in global trade. African poverty preceded the continent's contact with Europe and persists today. That is an outcome of unfortunate policy choices, most of which were freely chosen by Africa's leaders after independence.
Like Europe, Africa started out desperately poor. The late Professor Angus Maddison of Groningen University has estimated that, at the start of the Common Era, average per capita income in Africa was $470 per year (in 1990 dollars). The global average was roughly equal to that of Africa. Western Europe and North Africa, which were parts of the Roman Empire, were slightly better off ($600). In contrast, North America lagged behind Africa ($400). All in all, the world was both fairly equal and very poor.