Professor J.S. McKenzie says "The growth of large cities constitutes perhaps the greatest of all the problems of modern civilization." While the city is a problem in itself, creating certain biological and psychological conditions which are new to the race, the city is perhaps even more an intensification of all our other social problems, such as crime, vice, poverty, and degeneracy.
The city is in a certain sense a relatively modern problem, due to modern industrial development. While great cities were known in ancient times, the number was so few that the total population affected by city living conditions was comparatively small. Moreover, the populations of ancient cities have often been exaggerated. Probably at the height of its power, the population of Athens did not exceed 100,000; Carthage, 700,000; Rome, 500,000; Alexandria, 500,000; Nineveh and Babylon, 1,000,000. All the great cities of the ancient world practically disappeared with the fall of Rome. After Rome's fall, Constantinople was the only large city with over 100,000 population in all Europe for centuries. Down to 1600 A.D., indeed, there were only fourteen cities in all Europe with a population of over 100,000; and even in 1800, at the beginning of the nineteenth century, there were only twenty-two such cities. But at the end of the nineteenth century, in 1900, there were one hundred and thirty-six such cities in Europe, representing twelve per cent of the entire population. Moreover, while in 1800 less than three per cent of the total population of Europe lived in cities, in 1900 the total urban population was twenty-five per cent. Again, all of the great European capitals developed their present enormous population almost wholly within the nineteenth century. Thus, the population of London in 1800 was 864,000, while in 1901 it had reached 4,536,000, or in the total area policed, 6,581,000; the population of Paris in 1800 was 547,000, in 1901 it was 2,714,000; the population of Berlin in 1800 was only 172,000, in 1901 it was 1,888,000; the population of Vienna in 1800 was 232,000, in 1901 it was 1,674,000. These figures are cited to show that from four fifths to nine tenths of the growth of the greatest cities of the world has taken place within the nineteenth century.
Dr. Weber in his Growth of Cities in the Nineteenth Century illustrates the striking difference between the urban development of the nineteenth century and that of the eighteenth century by comparing the population of Australia in 1890 with the population of the United States in 1790. Australia in 1890, out of a population of 3,809,000 had 1,264,000, or 33.2 per cent, living in cities of 10,000 or over; while the United States in 1790, out of a population of 3,929,000 had only 123,000, or 3.14 per cent living in cities. Both countries, it will be noticed, had about the same total population at the two periods and the same area, but Australia in 1890 represented in its population the industrial development of the nineteenth century with its tendency toward urbanization, while the United States in 1790 represented the civilization of the eighteenth century with its predominating rural life.
The Growth of Cities in the United States.—A word about census terminology will be helpful before discussing the growth of cities in the United States. According to the United States census, a city is a place with a population of 8000 or over; a small city is a place with a population of 8000 to 25,000; a large city is a place with a population of from 25,000 to 100,000, and a great city is a place with a population above 100,000. These distinctions are necessary in discussing the problems of the city, because the problems of cities change rapidly when the population goes above 100,000. It is mainly the problem of the great city which we shall discuss in this chapter.
In 1800 there were only six cities in the United States with over 8000 population. Philadelphia was the largest of these, with 69,000, and New York second with 60,000. These cities contained a fraction less than four per cent of the population of the United States. In 1900, on the other hand, there were 546 cities in the United States with a population of over 8000. Moreover, over thirty-three per cent of the total population of the United States lived in cities of 8000 and over, while nearly one fifth of the total population lived in the thirty-eight great cities. Between 1890 and 1900 the gain in the urban population of the country was sixty per cent, while the gain in the rural population was only fifteen per cent. During that decade, in other words, the cities grew four times as fast as the country districts in population. Moreover, for that particular decade, the great cities grew faster than the smaller ones, but since 1900 certain state census statistics seem to show that the cities from 25,000 to 100,000 population are growing faster than those above 100,000.
Distribution of the Urban Population of the United States. If the urban population of the United States were distributed relatively uniformly among the several States, perhaps the problem of the city would not be so pressing as it is, but the urban population is largely concentrated in a very few states. Over fifty per cent of the urban population is found in the North Atlantic states alone. The five states of New York, Pennsylvania, Massachusetts, Illinois, and Ohio contain also more than half of the urban population of the whole country. If we add to these five states New Jersey and Missouri, then these seven states contain nearly two thirds of the urban population of the United States.
It will be noticed that these states with a large urban population are the great manufacturing states of the Union. The proportion of urban to rural population indeed is a good index to industrial progress. The states with over half their population urban in 1900 were, Rhode Island, 81 per cent; Massachusetts, 76 per cent; New York, 68.5 per cent; New Jersey, 61.2 per cent; Connecticut, 53.2 per cent. States with more than one fourth of their population urban were, Illinois, 47.1 per cent; Maryland, 46.9 per cent; Pennsylvania, 45.5 per cent; California, 43.7 per cent; Delaware, 41.4 per cent; New Hampshire, 38.6 per cent; Ohio, 38.5 per cent; Colorado, 38.1 per cent; Washington, 31.9 per cent; Michigan, 30.9 per cent; Missouri, 30.8 per cent; Wisconsin, 30.7 per cent; Louisiana, 29.3 per cent; Montana, 27 per cent; Minnesota, 26.8 per cent; Utah, 25.2 per cent. It will be noticed that only one of these states with the population more than one fourth urban is distinctively southern, namely, Louisiana. This is due to the fact that heretofore the South has been largely agricultural in its industries, consequently only a few of the great cities of the country are found within its borders.
There are but few countries in Europe that come up with the most urban of our American states. Certain countries of Western Europe, however, equal the most urban of our states, and the following countries have at least one quarter of their population urban: England and Wales, Scotland, Belgium, Saxony, Holland, Prussia, and France. The most urban of our states, however, such as Massachusetts, Rhode Island, and New York, surpass all European countries in the number of their population living in cities, with the exception of England and Wales. This again is due to the fact that certain of our states have specialized in manufacturing industries more than any European country, with the exception of England and Wales.
Before leaving the statistics of the growth of cities, it is worth our while to note that certain great urban centers are developing in this country which promise to show, even in the near future, the most extensive urbanization of population known to the world; for example, a line of cities and suburban communities is now developing which will in the near future connect New York and Boston on the one hand and New York, Philadelphia, and Washington on the other hand. Thus in a few years, stretching from Washington to Boston, a distance of five hundred miles, there promises to be a continuous chain of urban communities with practically no rural districts between them. In a sense, this will constitute one great city with a population of twenty millions or upwards. Other urban centers, though not so extensive, are also developing at other points in the United States. At the end of the twentieth century it is safe to say that this country will have at least a dozen cities with a population of over one million. Moreover, so far as we can see at the present time, there is no end in the near future to this growth of the urbanization of our population; for the causes of this great growth of cities seem inherent in our civilization. Let us see what these causes are.
Causes of the Growth of Great Cities.—There may be distinguished two classes of causes of the growth of cities: (1) general or social causes, and (2) minor or individual causes. It is the social causes, the causes inherent in our civilization, which are of particular interest to us. Among these social causes we shall place: