ABSTRACT
For the great majority of intellectual history, attempts to understand mental life have focused on the individual. Cognitive psychology constitutes an excellent recent example of this tradition, in that it has concerned itself almost entirely with the study of the representations and processes used in autonomous activities. For example, researchers study how individuals perceive, remember, reason, or act in isolation. The question of how individuals use such representations and processes to take each other into account in performing joint actions has not been addressed in detail. If we are able to do so, we may start to explain the mental foundations of human sociality.
