In the course of developing the Russian application of Marxism, the pamphlet Imperialism, the Highest Stage of Capitalism (1916) presented Lenin's analysis of an economic development predicted by Karl Marx: that capitalism would become a global financial system, wherein advanced industrial countries export financial capital to their colonial countries, to finance the exploitation of their natural resources and the labour of the native populations. Such superexploitation of the poor (undeveloped) countries allows the wealthy (developed) countries to maintain some homeland workers politically content with a slightly higher standard of living, and so ensure peaceful labour–capital relations in the capitalist homeland. (see: labour aristocracy, globalization) Hence, a proletarian revolution of workers and peasants could not occur in the developed capitalist countries, while the imperialist global-finance system remained intact; thus an underdeveloped country would feature the first proletarian revolution; and, in the early 20th century, Imperial Russia was the politically weakest country in the capitalist global-finance system.[5] In the United States of Europe Slogan (1915), Lenin said: