During the imperial period, French colonial law developed regimes of exception for indigenous peoples in contravention of the principles of the Declaration of the Rights of Man and the Citizen. These were justified by the need to secure order and by the claim that ‘natives’ were too ‘backward’ for the juridical principles upheld by the Declaration to apply to them. Introduced as temporary measures in Algeria in the 1840s, these measures, which discriminated between the French settler ‘citizens’ and the native ‘subjects’, became firmly entrenched by the Third Republic, supported by the emergence of the ‘colonial sciences’ and the International Colonial Institute in the late 19th century. The exception became the rule. The colonial juridical regimes were derogatory of principle in two major ways: they subsumed universality to territoriality and defined the personhood of indigenous peoples according to racial, cultural or religious affiliations rather than as part of a shared humanity. Two particularly exorbitant measures of wide application were administrative internment without right of review and collective responsibility of a group for individual actions. Such regimes of exception persisted in French colonies until after World War II.