"In those parts of the continent where land was still in African hands, colonial governments forced Africans to produce cash crops no matter how low the prices were. The favorite technique was taxation. Money taxes were introduced on numerous items—cattle, land, houses, and the people themselves. Money to pay taxes was got by growing cash crops or working on European farms or in their mines. [...] Finally, when all else failed, colonial powers resorted widely to the physical coercion of labor—backed up of course by legal sanctions, since anything which the colonial government chose to do was “legal.”"