Variety in human dreams, like personality among savages, may indeed be inwardly very great, but it is not efficacious. To be socially important and expressible in some common medium, initial differences in temper must be organised into custom and become cumulative by being imitated and enforced. The only artists who can show great originality are those trained in distinct and established schools; for originality and genius must be largely fed and raised on the shoulders of some old tradition. A rich organisation and heritage, while they predetermine the core of all possible variations, increase their number, since every advance opens up new vistas; and growth, in extending the periphery of the substance organised, multiplies the number of points at which new growths may begin. Thus it is only in recent times that discoveries in science have been frequent, because natural science until lately possessed no settled method and no considerable fund of acquired truths. So, too, in political society, statesmanship is made possible by traditional policies, generalship by military institutions, great financiers by established commerce. If we ventured to generalise these observations we might say that such an unequal distribution of capacity as might justify aristocracy should be looked for only in civilised states. Savages are born free and equal, but wherever a complex and highly specialised environment limits the loose freedom of those born into it, it also stimulates their capacity. Under forced culture remarkable growths will appear, bringing to light possibilities in men which might, perhaps, not even have been possibilities had they been left to themselves; for mulberry leaves do not of themselves develop into brocade. A certain personal idiosyncrasy must be assumed at bottom, else cotton damask would be as good as silk and all men having like opportunities would be equally great. This idiosyncrasy is brought out by social pressure, while in a state of nature it might have betrayed itself only in trivial and futile ways, as it does among barbarians. [Sidenote: Sophistical envy.]