Unstable equilibrium, rapid fermentation, and a succession of explosive reports are thus the chief notes of modern ethics. Scepticism and traditionalism, empiricism and rationalism, crude naturalisms and all-embracing idealisms, flourish side by side--all the more flourish, one suspects, because side by side. Spencer exults because natural science reveals that a rapid transit system of evolution is carrying us automatically to the goal of perfect man in perfect society; and his English idealistic contemporary, Green, is so disturbed by the removal from nature of its moral qualities, that he tries to show that this makes no difference, since nature in any case is constituted and known through a spiritual principle which is as permanent as nature is changing. An Amiel genteelly laments the decadence of the inner life, while his neighbor Nietzsche brandishes in rude ecstasy the banner of brute survival as a happy omen of the final victory of nobility of mind. The reasonable conclusion from such a scene is that there is taking place a transformation of attitude towards moral theory rather than mere propagation of varieties among theories. The classic theories all agreed in one regard. They all alike assumed the existence of _the_ end, the _summum bonum_, the final goal; and of _the_ separate moral force that moves to that goal. Moralists have disputed as to whether the end is an aggregate of pleasurable state of consciousness, enjoyment of the divine essence, acknowledgment of the law of duty, or conformity to environment. So they have disputed as to the path by which the final goal is to be reached: fear or benevolence? reverence for pure law or pity for others? self-love or altruism? But these very controversies implied that there was but the one end and the one means.