Such a process cannot fail to have its reaction on the social environment. It must counteract the exaggeration of the possessive instinct. To that impulse, when it transgresses the legitimate bounds of biological needs and threatens to grow like a destructive cancer, the æsthetic instinct proposes another end, a more human end, that of æsthetic joy. Therewith the exuberance of insatiable and ruinous cupidity is caught in the forms of art, the beauty of the universe is manifested to all eyes, and the happiness which had been sought in the paradoxical enterprise of glutting that insatiable desire finds its perpetual satisfaction in the absolute and complete realisation of beauty. As Jules de Gaultier understands it, we see that the æsthetic instinct is linked on to the possessive instinct. Bertrand Russell would sometimes seem to leave the possessive instinct in the void without making any provision for its satisfaction. In Gaultier’s view, we may probably say it is taken in charge by the æsthetic instinct as soon as it has fulfilled its legitimate biological ends, and its excessive developments, what might otherwise be destructive, are sublimated. The æsthetic instinct, Gaultier insists, like the other instincts, even the possessive instinct, has imperative claims; it is an appetite of the _ego_, developed at the same hearth of intimate activity, drawing its strength from the same superabundance from which they draw strength. Therefore, in the measure in which it absorbs force they must lose force, and civilisation gains. The development of the æsthetic sense is, indeed, indispensable if civilisation—which we may, perhaps, from the present point of view, regard with Gaultier as the embroidery worked by imagination on the stuff of our elementary needs—is to pass safely through its critical period and attain any degree of persistence. The appearance of the æsthetic sense is then an event of the first order in the rank of natural miracles, strictly comparable to the evolution in the organic sphere of the optic nerves, which made it possible to know things clearly apart from the sensations of actual contact. There is no mere simile here, Gaultier believes: the faculty of drawing joy from the images of things, apart from the possession of them, is based on physiological conditions which growing knowledge of the nervous system may some day make clearer.[149]