Among the ancients the connection between politics and morals was never questioned, although there were differences of opinion as to which science stood first in importance. Thus, while Plato put politics second to morals, Aristotle regarded politics as the chief science and ethics as a part of politics. This connection between the sciences was denied by Machiavelli, who lays down the dictum that, in the relations of sovereigns and states, the ordinary rules of morality do not apply. See _The Prince_, Ch. XVIII. “A Prince,” he says, “and most of all a new Prince, cannot observe all those rules of conduct in respect of which men are accounted good, being frequently obliged, in order to preserve his Princedom, to act in opposition to good faith, charity, humanity, and religion. He must therefore keep his mind ready to shift as the winds and tides of Fortune turn, and, as I have already said, he ought not to quit good courses if he can help it, but should know how to follow evil courses if he must.” Hume thought that laxer principles might be allowed to govern states than private persons, because intercourse between them was not so “necessary and advantageous” as between individuals. “There is a system of morals,” he says, “calculated for princes, much more free than that which ought to govern private persons,” (_Treatise_, III., Part II., Sect. IX.) [Tr.] The Terminus of morals does not yield to Jupiter, the Terminus of force; for the latter remains beneath the sway of Fate. In other words, reason is not sufficiently enlightened to survey the series of predetermining causes which would make it possible for us to predict with certainty the good or bad results of human action, as they follow from the mechanical laws of nature; although we may hope that things will turn out as we should desire. But what we have to do, in order to remain in the path of duty guided by the rules of wisdom, reason makes everywhere perfectly clear, and does this for the purpose of furthering her ultimate ends.