There are still some people who regard the settlement of countries and the selection of great capitals as a matter of pure romantic accident. Philosophers know, that, if, at the opening of the Adamic period, any man had existed with a perfect knowledge of the world's physical geography and the laws of national development, he would have been able to foretell _a priori_ the situations of all the greatest capitals. It is a law as fixed as that defining the course of matter in the line of least resistance, that population flows to the level where the best livelihood is most easily obtained. The brute motives of food and raiment must govern in their selection of residence nine tenths of the human race. A few noble enthusiasts, like those of Plymouth Colony, may leave immortal footprints on a rugged coast, exchanging old civilization for a new battle with savagery, and abandoning comfort with conformity for a good conscience with privation. Still, had there been back of Plymouth none of the timber, the quarries, the running streams, the natural avenues of inland communication, and to some extent the agricultural capabilities which make good subsistence possible, there would have been no Boston, no Lynn, no Lowell, no New Bedford, no healthy or wealthy civilization of any kind, until the Pilgrim civilization had changed its base. It may be generally laid down that the men who leave home for truth's sake exile themselves as much for the privilege to mere opportunity of living truly. New York was not even in the first place settled by enthusiasts. Trade with the savages, nice little farms at Haarlem, a seat among the burgomasters, the feast of St. Nicholas, pipes and Schiedam, a vessel now and then in the year bringing over letters of affection ripened by a six months' voyage, some little ventures, and two or three new colonists,--these were the joys which allured the earliest New-Yorkers to the island now swarming from end to end with almost national vitalities. Not until 1836, when the Italian Opera was first domiciled in New York, on the corner of Leonard and Church Streets, could the second era of metropolitan life be said fully to have set in there,--the era when people flow toward a city for the culture as well as the livelihood which it offers them. About the same time American studios began to be thronged with American picture-buyers; and there is no need of referring to the rapid advance of American literature, and the wide popularization of luxuries, dating from that period.