The inventions and discoveries which were the immediate cause of the industrial revolution succeeded one another with a bewildering rapidity that is well illustrated in the case of communication. The steamboat, first made practicable in 1807, and the locomotive, invented about 1815, provided the means of rapid transportation of goods, people and messages. The power press (1814) and the manufacture of paper from wood-pulp (begun in 1854) made possible cheap and abundant reading matter. The telegraph, invented about 1837, laid the basis for instantaneous communication. The first trans-Atlantic cable (1858) annihilated the water barrier to thought. The telephone (1876) and the wireless (1896) brought the more remote parts of each country and of the world within easy reach of the centers of civilization, while the radio-phone (1921) enables millions to sit around a common table for thought, instruction or enjoyment. The camera (1802) supplemented by the moving picture process (1890) has enabled those who do not read to secure information that was formerly reserved for the learned and the cultured. Thus steam, electricity, and a number of other discoveries and inventions in the realm of natural science have brought the minds of the world in as close touch as were the inhabitants of a fifteenth century Italian city.
The effects of industrialism date only from history's yesterday, yet its results have already been momentous and far-reaching. This is particularly true of the close dependence of industries upon supplies of raw materials and fuels, of the volume and the variety of the goods produced and transported, of the speed with which communications are sent, of the widened opportunities for travel, and of the immense amount of information on the printed page and the film that goes, each day, from one part of the world to another.
Nature has not scattered coal, iron, copper and sugarland over the earth in the same lavish way that she has distributed air and sunshine. On the contrary, the important resources from which industry derives its raw materials and its fuels are found within very limited areas to which the remainder of the world must go for the commodities that supply its basic industries.
Within each country raw materials are produced at one point and shipped elsewhere. Ore, coal, grain and meat-animals make up the bulk of the freight tonnage in Europe, in America and in Australia. A similar economic relation exists between the various countries, some of which produce far more than their proportionate share of minerals and fuels. Thus, in 1913, the United States, with but 7 per cent of the world's population, produced 36 per cent and consumed 37 per cent of the world's iron ore supply. The figures for the other important nations were: ("World Atlas of Commercial Geology," Dept. of the Interior, Washington, 1921, p. 27)
| Per Cent Produced | Per Cent Consumed | |||
| Germany | 20 | 27 | ||
| Britain | 9 | 14 | ||
| France | 12 | 7 | ||
| Russia | 5 | 5 | ||
| Belgium | 0 | 4 | ||
| Spain | 6 | 1 |
Only in France and Spain did production exceed consumption. Four of the remaining countries used more iron ore than they produced, which meant that they were forced to depend upon some other country for their supply. Belgium, with her many industries, imported practically all of the iron ore that she used.
Coal furnishes an even more striking illustration of the economic dependence of one part of the world upon another. The production and consumption of coal, for 1913, in millions of tons, were as follows:
| Tons Produced | Tons Consumed | |||
| United States | 517 | 495 | ||
| Britain | 292 | 217 | ||
| Germany | 191 | 167 | ||
| France | 40 | 60 | ||
| Italy | 1 | 10 | ||
| Austria-Hungary | 17 | 30 |
The United States, Britain and Germany produced, in this one year, 121 millions of tons of coal that were either stored or exported. France, Italy and Austria, together with many of the smaller industrial countries of Europe were forced to depend upon their neighbors for coal. In the case of Italy, practically all of the coal used was imported.
Again, the United States and Spain are alone among the principal countries producing a surplus of copper. Out of a consumption (1913) of 127,000 tons, Britain imported 126,572; France imported 91,437 of the 91,486 tons consumed, and Germany, out of 259,300 tons consumed, imported 234,000 tons.