=The Drift of Population to the Cities.=—The distribution of the people has also been influenced by the growth of large cities. In 1790 there were only five communities with populations exceeding 8000, namely New York, Philadelphia, Boston, Baltimore, and Charleston. Taken altogether they had only 130,000 inhabitants, that is to say only one person in every thirty lived in these towns. But so rapidly did the various towns and cities spring up all over the country that by the time of the Civil War there were nearly 150 with populations above 8000, and today there are nearly a thousand. Not a single American city had 70,000 population in 1790; today there are more than a hundred such cities. [Sidenote: The chief causes of city growth.] This remarkable drift of population into the towns and cities, which began early in the nineteenth century and has continued ever since, shows no signs of slackening. It is due to many causes, including the great demand for industrial labor in the cities, the attractiveness of city life to the young men and women of the country districts (see p. 351), and the tendency of the immigrants to locate in the crowded centers. Wherever industry and commerce thrive, there cities will be built and will grow. Half the population of the United States is now living in towns and cities of over 2500 population. If the drift to the cities continues at its present rate of progress, ninety per cent of the people will be living in the cities and towns by 1980 and only ten per cent in the country districts. That is already the case in England.[10] One Englishman in every seven lives in London. That seems to be a very striking fact until we remember that one American in every ten lives in New York, Chicago, or Philadelphia. New York City has nearly six millions now; in fifty years, at its present rate of growth, it will be an urban giant of fifteen millions or more. [Sidenote: Why most immigrants go to the cities.]