Defending peace is no more important task internationally for our party, our people, and for all humanity, noted L.I. Brezhnev at the XXVI Congress of the CPSU. Studying the causes of the Second World War is of great importance for the mobilization of progressive forces in the struggle to strengthen peace and rid peoples of the threat of nuclear catastrophe. It was prepared by the imperialists of all countries and was unleashed by fascist Germany. The famous international affairs scholar, Doctor of Historical Sciences I. Ovsyany, based on the past top secret documents of the imperialist governments and their intelligence services, and extensive memoir literature, tells in artistic and documentary essays about the complex political intrigues of bourgeois diplomacy in the last weeks of peace, which largely contributed to the outbreak of the Second World War.