Apreliminary remark on method should be made. The account which follows does not attempt to give an exhaustive description of the whole Portuguese colonial system. The method chosen is rather to select various key sectors which appear to be privileged expressions of the whole, and to show their rigorous coherence. An initial criterion guided the selection of the areas examined: they are those where a marked differential is evident between the Portuguese example and the normal colonial pattern. It is through the specific characteristics of Portuguese colonialism that a model of the whole will be suggested.
The most notorious single feature of the Portuguese African colonies is their systematic use of forced labour. It is this which immediately identifies the Portuguese variant of colonialism as against all others. Official statistics and statutes are sparser and more misleading in this area than in any other. A great deal of the evidence of the use of forced labour inevitably comes from foreign observers. However these, together with occasional involuntary official admissions and the open rationale of exploitation, combine to form a picture which is, within limits, precise and consistent.
Labour in the Portuguese colonies outside the African subsistence economy is divided into four categories: correctional, obligatory, contract and voluntary.
1. Correctional Labour. This is a legal penalty inflicted on Africans who infringe the Criminal or Labour Codes. It is also imposed in Mozambique for failure to pay the native head tax (in Angola the penalty is obligatory labour).
2. Obligatory Labour. This may be imposed by the government for public works, when voluntary workers are insufficient. The only groups formally exempted from it are those under 14 or over 60, the sick and the invalid, Africans already in employment, recognised chiefs, workers on their first six months home after contract work,