In recent years, there has been increased interest in a variety of ways that private actors, especially actors in the business world, broadly understood, can contribute to addressing important social problems and persistent injustices. In this essay, I aim to articulate and begin to answer what seem to me to be some of the most important and challenging normative questions arising with regard to social entrepreneurship as a mode of economic activity aimed at addressing social problems or promoting justice. I focus on questions about the relationship between the pursuit of social entrepreneurial activity, the satisfaction of obligations to promote justice, and claims to income and wealth produced by successful social entrepreneurial ventures. I argue that there are reasons to think that social entrepreneurial activity can be a way that individuals (attempt to) satisfy at least some of their obligations of justice, but note that there are moral risks involved in attempting to satisfy these obligations in this way. And I suggest that there are at least some reasons, including recognition of the grounds on which we might sometimes prefer that people in a position to take these risks do so, to think that only those who accept broader moral views that are very demanding can consistently deny that social entrepreneurs who successfully generate substantial profits are morally entitled to retain them.