 Aquinas, Thomas |  autonomy: in moral and political philosophy |  Bentham, Jeremy |  citizenship |  communitarianism |  constitutionalism |  contractarianism |  democracy |  egalitarianism |  equality |  free rider problem |  Habermas, Jürgen |  Hobbes, Thomas: moral and political philosophy |  Hume, David |  Kant, Immanuel: social and political philosophy |  legal obligation and authority |  liberalism |  Locke, John: political philosophy |  Plato: ethics and politics in The Republic |  political obligation |  Rawls, John |  sovereignty 