Various theoretical models in psychology have emphasized the social foundation of the mind and the role that social interactions play in human development. Interactive Minds emphasizes social transaction and communication between minds without implying particular mechanisms and outcomes. For instance, not all products of interacting minds are positive. Interactive Minds also takes a life-span perspective, which is especially suited for understanding interactive dynamics of behavior and human development. Experts from a variety of fields address such issues as biological aspects of cooperation, the role of social interaction in learning, the conceptualization of linguistic knowledge, and peer problem solving. In a concluding Epilogue, implications are presented for various fields, including education, developmental and cognitive psychology, and cultural anthropology.