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ESSAYS ON LIBERTY

success, accustomed the masses to be arbitrary as well as insubordinate. The fall of many governments, and the frequent redistribution of territory, deprived all settlements of the dignity of permanence. Tradition and prescription ceased to be guardians of authority; and the arrangements which proceeded from revolutions, from the triumphs of war, and from treaties of peace, were equally regardless of established rights. Duty cannot be dissociated from right, and nations refuse to be controlled by laws which are no protection. In this condition of the world, theory and action follow close upon each other, and practical evils easily give birth to opposite systems. In the realms of free-will, the regularity of natural progress is preserved by the conflict of extremes. The impulse of the reaction carries men from one extremity towards another. The pursuit of a remote and ideal object, which captivates the imagination by its - splendour and the reason by its simplicity, evokes an energy which would not be inspired by a rational, possible end, limited by many antagonistic claims, and confined to what is reasonable, practicable, and just. One excess or exag- geration is the corrective of the other, and error promotes truth, where the masses are concerned, by counterbalancing a contrary error. The few have not strength to achieve great changes unaided; the many have not wisdom to be moved by truth unmixed. Where the disease is various, no particular definite remedy can meet the wants of all. Only the attraction of an abstract idea, or of an ideal state, can unite in a common action multitudes who seek a universal cure for many special evils, and a common restorative applicable to many different conditions. And hence false principles, which correspond with the bad as ,veIl as with the just aspirations of mankind, are a normal and necessary element in the social life of nations. Theories of this kind are just, inasmuch as they are provoked by definite ascertained evils, and undertake their removal. They are useful in opposition, as a warning or a threat, to modify existing things, and keep awake the consciousness of wrong. They cannot serve