The cognition agency is a theoretical development that configures cognition with traits, and initially explains how agency cognition is dependent on a set of formative traits. When referring to cognition, we are interested in it’s the nature and outcome of the immanent and adventitious social processes that impact agency. Social cognition is an important aspect of personality psychology, and before developing our trait theory for the cognition agency, it is useful to consider a background of piecemeal theory that has developed in the field, which will incidentally further demonstrate the historical lack of integration in the field. Since this chapter centres on cognition, it is appropriate to define its nature.