'With Co-Operative Action, Charles Goodwin has cemented his legacy as one of the most creative, insightful, and unfettered scholars of human social action in interaction. The effects of his research over four decades are felt in fields from linguistic anthropology to cognitive science to microsociology to digital ethnography to communications. He leaves us with the tools to see how that vision - and, in particular, its core concept, culture - can be causally grounded in the temporally framed experience of co-operative, copresent life.' N. J. Enfield, American Anthropologist