This chapter discusses the remaining three conceptions of the political philosopher, and adopts a version of the Rawlsian view organized around a notion of public reason. Political philosophy has four distinct tasks. The first is to help create societies that decide about constitutional essentials and justice from a standpoint of public reason. The second task involves making substantive proposals. This might involve anything from proposing principles of justice to commenting on policy. Most philosophical writing aimed at the public is part of this task. The third task is to ponder concepts such as common good, rights, and justice. This task involves philosophical background work concerning the merits of different conceptions of justice. The fourth task occurs within comprehensive doctrines. Full justification requires integration of a conception of justice within a doctrine. How, and whether, this is possible requires philosophical debate. Combining the first three roles, philosophers emerge as theory-providing citizen-discussants.