This book is the result of the activities of a group of scholars, members of the Language Origins Society, who have approached the question of language origin not only from the viewpoint of linguistics, but also from that of anatomy, physiology, social sciences, physical anthropology, paleoanthropology, paleontology, comparative zoology, general biology, ethology, evolutionary biology, psychology, etc. The volume thus clearly reflects the interdisciplinary approach the Language Origins Society is advocating.