Industrial trends magnified the demographic, for here again Germany was far and away the fastest growing economic power on the Continent. This was so not only in the basic industries of coal and iron and steel but also in the advanced fields of electricity, chemicals, and internal combustion. Germany’s swift development strained the traditional balance of power in her own society and politics. By the end of the century Germany had become a highly urbanized, industrial society, complete with large, differentiated middle and factory proletariat classes, but it was still governed largely by precapitalist aristocrats increasingly threatened by demands for political reform.

Industrialization also made possible the outfitting and supply of mass armies drawn from the growing populations. After 1815 the monarchies of Europe had shied away from arming the masses in the French revolutionary fashion, and the events of 1848 further justified their fear of an armed citizenry. But in the reserve system Prussia found a means of making possible a rapid mobilization of the citizenry without the risk to the regime or the elite officer corps posed by a large standing, and idle, army. (In Austria-Hungary the crown avoided disloyalty in the army by stationing soldiers of one ethnic group on the soil of another.) After Prussia’s stunning victory over France in 1871, all the great powers came sooner or later to adopt the German model of a mass army, supplied by a national network of railways and arms industries coordinated in turn by a general staff. The industrialization of war meant that planning and bureaucracy, technology and finance were taking the place of bold generalship and esprit in the soldier’s craft.

The final contribution to the revolution in warfare was planned research and development of weapons systems. Begun hesitantly in the French navy in the 1850s and ’60s, command technology—the collaboration of state and industry in the invention of new armaments—was widely practiced by the turn of the century, adding to the insecurity that inevitably propelled the arms races. The demographic, technical, and managerial revolutions of the 19th century, in sum, made possible the mobilization of entire populations and economies for the waging of war.

The home of the Industrial Revolution was Great Britain, whose priority in the techniques of the factory system and of steam power was the foundation for a period of calm confidence known (with some exaggeration) as the Pax Britannica. The pound sterling became the preferred reserve currency of the world and the Bank of England the hub of international finance. British textiles, machinery, and shipping dominated the markets of Asia, South America, and much of Europe. The British Isles (again with some hyperbole) were “the workshop of the world” and in consequence from 1846 led the world in promoting free trade. British diplomacy, proudly eschewing alliances in favour of “splendid isolation,” sought to preserve a balance of power on the Continent and to protect the routes to India from Russian encroachment in the Middle East or Afghanistan.

The Pax Britannica could last only as long as Britain’s industrial hegemony. But that hegemony very naturally impelled other nations somehow to catch up, in the short term by imposing protective tariffs to shield domestic industries and in the longer term by granting government subsidies (for railroads and other national development work) and the gradual replication of British techniques. First Belgium, France, and New England, then Germany and other states after 1850 began to challenge Britain’s industrial dominance.

France (1860), Prussia (1862), and other countries then reversed earlier policies and followed the British into free trade. But in 1873 a financial panic, attributed by some to overextension in Germany after receipt of France’s billion-franc indemnity, ended the period of rapid growth. In the depression of 1873–96 (actually years of slower, uneven growth) industrial and labour leaders formed cartels, unions, and lobbies to agitate for tariffs and other forms of state intervention to stabilize the economy. Bismarck resisted until European agriculture also suffered from falling prices and lost markets after 1876 owing to the arrival in European ports of North American cereals. In 1879 the so-called alliance of rye and steel voted a German tariff on foreign manufactured goods and foodstuffs. Free trade gave way to an era of neo-mercantilism. France, Austria, Italy, and Russia followed the new (or revived) trend toward tariff protection. After 1896 the volume of world trade rose sharply again, but the sense of heightened economic competition persisted in Europe.

Social rifts also hardened during the period. Challenged by unrest and demands for reforms, Bismarck sponsored the first state social insurance plans, but he also used an attempt on the kaiser’s life in 1878 as a pretext to outlaw the Social Democratic Party. Conservative circles, farmers as well as the wealthier classes, came gradually to distrust the loyalty of the urban working class, but industrialists shared few other interests with farmers. Other countries faced similar divisions between town and country, but urbanization was not advanced enough in Russia or France for socialism to acquire a mass following, while in Britain agriculture had long since lost out to the commercial and industrial classes, and working-class participation in democratic politics was on the rise (male suffrage was still dependent upon property qualiifications, but the Second Reform Act [1867] had extended the vote to many workingmen in the towns and cities). The social divisions attending industrialization were especially acute in Germany because of the rapidity of her development and the survival of powerful precapitalist elites. Moreover, the German working class, while increasingly unionized, had few legal means of affecting state policy. All this made for a series of deadlocks in German politics that would increasingly affect foreign policy after Bismarck’s departure.