Following a discussion of activity theory as an approach to human development originally rooted in transformational change, we review the historical context and diverse conceptualizations of social conduct from the field of sociology. The discussion of social conduct is broken into theories of social action, theories of enactment, and contemporary sociological attempts at critical integration of the two across local and extralocal social processes. We conclude with an assessment of these sociological contributions in relation to what we term the threefold dialectic of material production, local and extralocal dimensions of intersubjective exchanges, and subjectivity that is fundamental to noncanonical understandings of activity theory. (Contains 1 figure and 15 footnotes.)