The book of the outstanding researcher S.V. Zharnikova "The Origin of the Indo-Europeans" in 4 volumes is devoted to the study of the ancestral home of the Indo-European peoples: Indian, Iranian, Slavic, Baltic, Germanic, Celtic, Romance, Albanian, Armenian and Greek language groups. Part one of this huge work is devoted to the problem of localizing the ancestral home of the Indo-Europeans. This problem has been facing science for a long time. This encyclopedic work answers such a question.