Philip Jenkins's book The Great and Holy War is dedicated to a popular topic in the West - the First World War (1914-1918), which marked the beginning of global historical changes that occurred 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 historian of religion, explores the background to the epochal post-war changes. The reader will be interested in the analysis and conclusions made by the author, especially those related to world religions and alternatives for the development of civilization as a whole, which have undergone dramatic changes since the First World War.