The major concepts of nationalist political thought in Tanzania formed at the meeting point between local and international understandings of exploitation, and prescriptions for its removal. These ideas were given social form through a politics of enmity concerned with defining enemies of the nation and creating corresponding purge categories. Acquiring urban citizenship in Tanzania required the demonstrated commitment to fight exploitation for a party and state hostile to urban growth. While such ideas formed the boundaries of legitimate political debate, Africans struggling to lay claim to urban life appropriated nationalist idioms to lampoon official pieties and make sense of class differentiation in a socialist country.