<P>This volume concerns the longstanding intellectual puzzle of how individuals overcome their biological, neural, and mental finitude to achieve sociality. It explores how humans take each other into account, coordinate their actions, and are able to share their inner states and to communicate.</P><P>Sophisticated views on the bases of sociality are detailed at the level of neural mechanisms, perception and memory, motivation, communication and dialog, culture, and evolution. These insights have been inspired by major strides and exciting new developments in disciplines as far afield as ethology, evolutionary ecology, neuroscience, cognition, memory, developmental and social psychology, psycholinguistics, philosophy, robotics, and sociology. The volume is the first to bridge these disciplinary boundaries to lay the foundations for an integrated and general conceptualization of the bases of sociality and its implications for psychology. Each contribution presents different levels of the grounding of sociality and will further stimulate novel approaches to linking different layers of sociality, from the neural to the cultural level.</P>