Located at the crossroads of Europe, Asia, and the Middle East, the Caucasus region has played a critical role in the dissemination of languages, ideas, and cultures since prehistoric times. In this study, Aram Yardumian and Theodore Schurr explore the dispersal of human groups in the Caucasus beginning in the Palaeolithic period. Using evidence from archaeology, linguistics, and anthropological genetics, they trace changes in settlement patterns,...