There are two descriptions of the English Constitution which have exercised immense influence, but which are erroneous. First, it is laid down as a principle of the English polity, that in it the legislative, the executive, and the judicial powers are quite divided--that each is entrusted to a separate person or set of persons--that no one of these can at all interfere with the work of the other. There has been much eloquence expended in explaining how the rough genius of the English people, even in the middle ages, when it was especially rude, carried into life and practice that elaborate division of functions which philosophers had suggested on paper, but which they had hardly hoped to see except on paper. Secondly, it is insisted that the peculiar excellence of the British Constitution lies in a balanced union of three powers. It is said that the monarchical element, the aristocratic element, and the democratic element, have each a share in the supreme sovereignty, and that the assent of all three is necessary to the action of that sovereignty. Kings, lords, and commons, by this theory, are alleged to be not only the outward form, but the inner moving essence, the vitality of the Constitution. A great theory, called the theory of "Checks and Balances," pervades an immense part of political literature, and much of it is collected from or supported by English experience. Monarchy, it is said, has some faults, some bad tendencies, aristocracy others, democracy, again, others; but England has shown that a Government can be constructed in which these evil tendencies exactly check, balance, and destroy one another--in which a good whole is constructed not simply in spite of, but by means of, the counteracting defects of the constituent parts.