Philip Jenkins' book The Great and Sacred War is dedicated to the popular theme in the West - World War I (1914-1918), which marked the beginning of the global historical changes that took place throughout the 20th century. The main consequence of the war was the birth of a bipolar world, represented by socialist and capitalist socio-economic formations. Philip Jenkins, as a religious historian, explores the premises of epochal postwar change. The reader will be interested in the analysis and conclusion made by the author, especially those related to world religions and alternatives to the development of civilization as a whole, which underwent dramatic changes after the First World War.