 This article reviews the philosophical literature, covering various points of agreement among traditional conceptions of the common good, such as those favored by Plato, Aristotle, John Locke, J.J. Rousseau, Adam Smith, G.W.F. Hegel, John Rawls and Michael Walzer. It also covers some important disagreements, especially the disagreement between “communal” and “distributive” views. It concludes by considering three important topics in the literature: democracy, communal sharing, and competitive markets. In order to understand the issues, it is helpful to start by distinguishing the common good from various notions of the good that play a prominent role in welfare economics and welfare consequentialist accounts of political morality.