This chapter examines communitarianism and its central assumptions. It first considers two strands of communitarian thought: one camp argues that community should be seen as the source of principles of justice, whereas the other camp insists that community should play a greater role in the content of principles of justice. The chapter then explores the communitarian claim that the liberal ‘politics of rights’ should be abandoned for, or at least supplemented by, a ‘politics of the common good’. It also analyses the communitarian conception of the embedded self; two liberal accommodations of communitarianism, the so-called political liberalism and liberal nationalism; the communitarians’ ‘social thesis’, focusing on Charles Taylor’s belief that liberal neutrality cannot sustain the social conditions for the exercise of autonomy; and the connection between nationalism and cosmopolitanism. The chapter concludes with an overview of the politics of communitarianism.