 Though not all scholars agree on the meaning of the term, “neoliberalism” is now generally thought to label the philosophical view that a society’s political and economic institutions should be robustly liberal and capitalist, but supplemented by a constitutionally limited democracy and a modest welfare state. Recent work on neoliberalism, thus understood, shows this to be a coherent and distinctive political philosophy. This entry explicates neoliberalism by examining the political concepts, principles, and policies shared by F. A. Hayek, Milton Friedman, and James Buchanan, all of whom play leading roles in the new historical research on neoliberalism, and all of whom wrote in political philosophy as well as political economy. Identifying common themes in their work provides an illuminating picture of neoliberalism as a coherent political doctrine.