Many factors contributed to the late-nineteenth-century rush for empire, which was in turn one aspect of Western society’s generalized expansion in the age of industry and nationalism. Economic motives played an important role in the extension of political empires, especially in the British Empire. By the late 1870s, France, Germany, and the United States were industrializing rapidly behind rising tariff barriers. Great Britain was losing its early economic lead and facing increasingly tough competition in foreign markets. In this new economic climate, the seizure of Asian and African territory by continental powers in the 1880s raised alarms. Fearing that France and Germany would seal off their empires with high tariffs, which would result in the permanent loss of future economic opportunities, the British followed suit and began their own push to expand empire.

Actually, the overall economic gains of the new imperialism proved quite limited before 1914. The new colonies were simply too poor to buy much, and they offered few immediately profitable investments. Nonetheless, even the poorest, most barren desert was jealously prized. Colonies became important for political and diplomatic reasons. Each leading country saw overseas possessions as crucial to national security and military power.

Along with economic motives, many people were convinced that colonies were essential to great nations. “There has never been a great power without great colonies,” wrote one French publicist. Such statements reflected the growing intensity of European nationalism but also reflect Social Darwinian theories of brutal competition among races (see "Nationalism and Racism" in Chapter 23). As one prominent English economist argued, the “strongest nation has always been conquering the weaker . . . and the strongest tend to be best.”3 Thus European nations, which saw themselves as racially distinct parts of the dominant white race, had to seize colonies to show they were strong and virile. Moreover, since victory of the fittest in the struggle for survival was nature’s inescapable law, the conquest of “inferior” peoples was just. Social Darwinism and pseudoscientific racial doctrines fostered imperialist expansion.

So did the industrial world’s unprecedented technological and military superiority. Three aspects were particularly important. First, the rapidly firing Maxim machine gun was an ultimate weapon in many unequal battles. Second, newly discovered quinine proved effective in controlling malaria, which had previously decimated whites in the tropics. Third, the combination of the steamship and the international telegraph permitted Western powers to quickly concentrate their firepower in a given area when it was needed. Never before — and never again after 1914 — would the technological gap between the West and non-Western regions of the world be so great.

Social tensions and domestic political conflicts also contributed mightily to overseas expansion. In Germany and Russia, and in other countries to a lesser extent, conservative political leaders manipulated colonial issues to divert popular attention from the class struggle at home and to create a false sense of national unity. Thus imperial propagandists relentlessly stressed that colonies benefited workers as well as capitalists. Government leaders and their allies in the tabloid press successfully encouraged the masses to savor foreign triumphs and to glory in the supposed increase in national prestige. In short, conservative leaders defined imperialism as a national necessity, which they used to justify the status quo and their hold on power.

Finally, certain special-interest groups in each country were powerful agents of expansion. White settlers in the colonial areas demanded more land and greater state protection. Missionaries and humanitarians wanted to spread religion and stop the slave trade within Africa. Shipping companies wanted lucrative subsidies to protect rapidly growing global trade. Military men and colonial officials foresaw rapid advancement and highly paid positions in growing empires. The actions of such groups pushed the course of empire forward.