If, now, we turn from these perfectly simple savage communities to our own very complex and heterogeneous world, what do we find? An endless variety of soldiers, sailors, tinkers, tailors, butchers, bakers, candlestick makers, and jolly undertakers, most of whom fall into a certain rough number of classes, each with its own developed and inherited traits and peculiarities. Our world is made up, like the world of ancient Egypt and of modern India, of an immense variety of separate castes--not, indeed, rigidly demarcated and strictly limited as in those extremely hierarchical societies, but still very fairly hereditary in character, and given on the average to a tolerably close system of intermarriage within the caste. For example, there is the agricultural labourer caste--the Hodge Chawbacon of urban humour, who in his military avatar also reappears as Tommy Atkins, a little transfigured, but at bottom identical--the alternative aspect of a single undivided central reality. Hodge for the most part lives and dies in his ancestral village: marries Mary, the daughter of Hodge Secundus of that parish, and begets assorted Hodges and Marys in vast quantities, all of the same pattern, to replenish the earth in the next generation. There you have a very well-marked hereditary caste, little given to intermixture with others, and from whose members, however recruited by fresh blood, the object of our quest, the Divine Genius, is very unlikely to find his point of origin. Then there is the town artisan caste, sprung originally, indeed, from the ranks of the Hodges, but naturally selected out of its most active, enterprising, and intelligent individuals, and often of many generations standing in various forms of handicraft. This is a far higher and more promising type of humanity, from the judicious intermixture of whose best elements we are apt to get our Stephensons, our Arkwrights, our Telfords, and our Edisons. In a rank of life just above the last, we find the fixed and immobile farmer caste, which only rarely blossoms out, under favourable circumstances on both sides, into a stray Cobbett or an almost miraculous miller Constable. The shopkeepers are a tribe of more varied interests and more diversified lives. An immense variety of brain elements are called into play by their diverse functions in diverse lines; and when we take them in conjunction with the upper mercantile grades, which are chiefly composed of their ablest and most successful members, we get considerable chances of those happy blendings of individual excellences in their casual marriages which go to make up talent, and, in their final outcome, genius. Last of all, in the professional and upper classes there is a freedom and play of faculty everywhere going on, which in the chances of intermarriage between lawyer-folk and doctor-folk, scientific people and artistic people, county families and bishops or law lords, and so forth _ad infinitum_,