The active cause of all adaptation, as of all effort in general--and adaptation is nothing else than an effort of a particular kind--is the wish to satisfy some organic necessity, or to escape from some discomfort. In other words, the aim of adaptation is to give feelings of pleasure, and to diminish or suppress the feelings of discomfort. The being incapable of self-adaptation is for this reason far less able to procure agreeable, and avoid disagreeable, sensations than the normal being; he runs up against every corner, because he does not know how to avoid them; and he longs in vain for the luscious pear, because he does not know how to catch hold of the branch on which it hangs. The ego-maniac is a type of such a being. He must, therefore, necessarily suffer from the world and from men. Hence at heart he is bad-tempered, and turns in wrathful discontent against Nature, society and public institutions, irritated and offended by them, because he does not know how to accommodate himself to them. He is in a constant state of revolt against all that exists, and contrives how he may destroy it, or, at least, dreams of destruction. In a celebrated passage Henri Taine indicates ‘exaggerated self-esteem’ and ‘dogmatic argument’ as the roots of Jacobinism.[251] This leads to contempt for and rejection of institutions already established, and hence not invented or chosen by himself. He considers the social edifice absurd because it is not ‘a work of logic,’ but of history. Besides these two roots of Jacobinism which Taine has brought to light, there is yet another, and the most important, that has escaped his attention, viz., the inability of the degenerate to adapt himself to given circumstances. The ego-maniac is condemned by his natural organization to be a pessimist and a Jacobin. But the revolutions he wishes for, preaches, and perhaps effectively accomplishes, are barren as regards progress. He is, as a revolutionary, what an inundation or cyclone would be as a street-sweeper. He does not clear the ground with conscious aim, but blindly destroys. This distinguishes him from the clear-minded innovator, the true revolutionary, who is a reformer, leading suffering and stagnating humanity from time to time by toilsome paths into a new Canaan. The reformer hurls down with pitiless violence, if violence is necessary, the ruins which have become obstacles, in order to make way for useful constructions; the ego-maniac raves against everything that stands upright, whether useful or useless, and does not think of clearing the building-ground after the devastation; his pleasure consists in seeing heaps of rubbish overgrown by noxious weeds where once walls and gables reared themselves.