At the beginning of the twentieth century the world was stable and certain, but unequal. The Paris Exhibition of 1900 symbolises the optimism of a peaceful age when affluence is rising and people have faith in new technologies like electricity. The United States becomes the most powerful country in the world, destination for many immigrants from Europe. Compulsory education in many countries had led to a literate population exposed to new ideas, leisure and consumerism through newspapers. Trade unions grow in strength and force governments to protect employment conditions for workers, while suffragettes push for votes for women. Revolutions shake the political order in China and Russia. European empires continue to dominate the globe, however signs of dissent appear in India and South Africa, and Japan's victory over Russia in 1905 challenges the belief of white superiority. Nationalism rises in Europe, bringing the continent to conflict in 1914.