Communalism is one phase through which all human society passed. - Walter Rodney

Over the last few decades of colonialism, colonial possessions served capitalism as a safety valve in times of crisis. The first major occasion when this was displayed was during the great economic depression of 1929–34. During that period, forced labor was increased in Africa and the prices paid to Africans for their crops were reduced. Workers were paid less and imported goods cost a great deal more. That was a time when workers in the metropolitan countries also suffered terribly; but the colonialists did the best they could to transfer the burdens of the depression away from Europe and on to the colonies.

The unequal nature of the trade between the metropole and the colonies was emphasized by the concept of the “protected market,” which meant even an inefficient metropolitan producer could find a guaranteed market in the colony where his class had political control. Furthermore, as in the preceding era of pre-colonial trade, European manufacturers built up useful sidelines of goods which would have been substandard in their own markets, especially in textiles. The European farmer also gained in the same way by selling cheap butter, while the Scandinavian fisherman came into his own through the export of salted cod. Africa was not a large market for European products, compared to other continents, but both buying-prices and selling-prices were set by European capitalists. That certainly allowed their manufacturers and traders more easy access to the surplus of wealth produced in Africa than they would have had if Africans were in a position to raise the price of their own exports.

During the centuries of pre-colonial trade, some control over social, political, and economic life was retained in Africa, in spite of the disadvantageous commerce with Europeans. That little control over internal matters disappeared under colonialism. Colonialism went much further than trade. It meant a tendency towards direct appropriation by Europeans of the social institutions within Africa. Africans ceased to set indigenous cultural goals and standards, and lost full command of training young members of the society. Those were undoubtedly major steps backward.