This chapter traces some of the history of the individual intellectual threads of situated activity, embodiment, and dynamics that underlie the situated, embodied, dynamical (SED) approach. It particularly focuses on the years 1985- 1995. The first intellectual thread making up the SED approach is situated activity. Situated activity stresses three ideas such as concrete action, situatedness, and interactionism that have been traditionally neglected in artificial intelligence (AI) and cognitive science. A second intellectual thread in the SED approach is embodiment. There are three distinct ideas such as physical embodiment, biological embodiment, and conceptual embodiment that have been advanced by advocates of embodied cognitive science. The final intellectual thread constituting the SED approach is dynamics, within which one must distinguish at least three ideas: dynamical systems theory (DST), dynamical framework, and dynamical hypothesis. The chapter articulates an integrated theoretical framework that combines the insights from situatedness, embodiment, and dynamics.