The book offered to the attention of the Soviet reader was written by the progressive American economist Viktor Perlo. Proceeding from the classical Leninist definition of imperialism and attracting new and convincing factual material, the author reveals the predatory and parasitic nature of modern American imperialism, the aggressive nature of its policy. Perlo cites a number of facts testifying to the increased concentration of capital in the United States, characterizing the post-war division of the entire capitalist world between Wall Street monopolies.