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Eugenics advocates did not all favor the same policies. In Britain, they generally supported voluntary approaches. In the United States, Canada and Australia, efforts targeting people labeled “feebleminded” won broad support across political parties and helped spur compulsory sterilization laws.

France's 1791 constitution spoke about liberty but allowed only men with enough property to vote or hold public office. Later revolutionary governments also punished some political speech. Political freedom remained limited even during a revolution built around liberty.