This article examines the idea of territorial intervention by stressing the ambiguity, or vagueness, of the concept of territory. Three questions are asked, each inspired by a particular research experience. The first concerns the relationship between territory and community, that is to say, the social ties that constitute territory as a social entity. The second question examines the issue of poverty. The last question is social innovation, which is essential to territorial practices adapted to contemporary social change. The article argues that these issues are of general scope and should be at the center of any territorial intervention.