The main work of S. B. Fey - The origins of the world war - contains a large concrete historical material based on the study of diplomatic documents. However, reducing the main reasons for the First World War 1914-1918 to the existence of secret alliances and militarism, while ignoring the role of the economic rivalry of the imperialist powers, the colonial problem and downplaying the role of Anglo-German contradictions, S. B. Feichasto uncritically used German documents. Fey sought to prove that none of the powers involved in World War I desired a European war and that the decision of the 1919 Treaty of Versailles to hold Germany and its allies responsible for starting the war was "historically unfounded."