 As in the five historically significant theories surveyed in the previous section, the presumption has continued to be that the answer to the problem of political obligation must be stated in moral terms. When T. H. Green set out in 1879 “to discover the true ground or justification for obedience to law,” for example, he was looking for more than prudence alone can provide. “You ought to obey the law because you will suffer if you do not” may be a powerful reason for obedience, but it is not a reason that speaks to Green’s concern with “the moral function or object served by law…” (1986, p. 13). For Green, and for almost everyone else who has pondered it, the problem of political obligation is a moral problem, and the obligation in question is a kind of moral obligation. To have a political obligation, then, is to have a moral duty to obey the law.