How has development affected the practices of the state in Africa? How has the development state become the basis of social organisation? How do Tanzanians position themselves to obtain aid money to effect change in their personal lives? Financial aid flows have entrenched an economy of intervention in which the main beneficiaries are those who can claim to undertake development activities. Even for those not formally engaged in the development sector, its discourses influence everyday discussion about class and inequality, poverty and wealth, modernity and tradition. With Tanzania as the country focus, the author shows how the practices of development have infiltrated not only the state at large but many aspects of people's everyday lives. Maia Green is Professor of Social Anthropology at the University of Manchester.