The book by famous Russian historian Efim losifovich Pivovar, a member of the Russian Academy of Sciences, the Head of Science of the Russian State University for the Humanities (RSUH), and the head of the Department of History of the Near Abroad Countries of the Faculty of History at Lomonosov Moscow State University, is an attempt to conduct a comprehensive analysis of the integration processes that have been taking place in the space of Greater Eurasia in the twenty-first century. Based on a wide range of sources and scientific literature, the work considers main integration institutions, including the CIS, the CSTO, the EAEC, the EAEU, the Union State of Russia and Belarus, the Caspian Five, and the SCO, describes the most important areas of economic, social, humanitarian, military and political interaction and cooperation of the Greater Eurasia region states, and points out achievements as well as contradictions and difficulties in the course of the ongoing progressive integration activities.