 Green’s focus on political obligation concerns the nature and limits of the state’s enforceable demands on its citizens (LPPO §§1, 12). Social contract theory seeks to anchor political obligation in agreement, whether actual or hypothetical. Green discusses the social contract theories of Spinoza, Hobbes, Locke, and Rousseau. Though critical of social contract theory in general, he is especially critical of Hobbes and expresses sympathy with important elements in Locke and Rousseau.