Entirely above the question of methods, however, there are certain principles involved in American politics which it becomes of the highest importance to comprehend and which furnish the key to the apparently inexplicable confusion. These principles, it seems to me, are reducible to two, which may be likened to the centripetal and centrifugal forces in nature. As both are needed for the stability of the physical universe, so both the centralising and decentralising tendencies in politics are necessary for the co-ordination of the state. It is in the free play of these forces, each in its proper sphere, that lies the assurance of the perpetuity of American institutions. But as the ideal has not yet been reached, the practical result is that one tendency begins to act, at first legitimately, then from the aggrandisement of power and the “cohesive force of public plunder” the administrators of government attempt to stretch it unduly, the opposition comes to power and the same story is repeated. In each case the liberal party succeeds the conservative, acts at first wisely, then corrupted by the subtle temptations of place and power, and wishing to retain both, it becomes opposed to change and begets a new conservatism, while new liberals arise on a higher plane of evolution to continue the never-ending struggle. And it must be recollected that the conservative party of each generation is far more liberal than the one which it displaced, thus giving assurance of perpetual progress.