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CHAP. IX. accuracy to the ideas which then were from time to time forming on the subject of political obligation. The doctrine of an Original Compact can never be put higher than it is placed by Dr. Whewell, when he suggests that, though unsound, "it may be a convenient form for the expression of moral truths."

The extensive employment of legal language on political subjects previously to the invention of the Original Compact, and the powerful influence which that assumption has exercised subsequently, amply account for the plentifulness in political science of words and conceptions, which were the exclusive creation of Roman jurisprudence. Of their plentifulness in Moral Philosophy a rather different explanation must be given, inasmuch as ethical writings have laid Roman law under contribution much more directly than political speculations, and their authors have been much more conscious of the extent of their obligation. In speaking of moral philosophy as extraordinarily indebted to Roman jurisprudence, I must be understood to intend moral philosophy as understood previously to the break in its history effected by Kant, that is, as the science of the rules governing human conduct, of their proper interpretation and of the limitations to which they are subject. Since the rise of the Critical Philosophy, moral science has almost wholly lost its older meaning, and, except where it is preserved under a debased