Foucault and Circulations of Power

Michel Foucault, a key theorist of the Post-Structuralist movement (Lois Tyson, Critical Theory Today, 2nd ed., 284-8)--

power "circulates" rather than descending vertically down a hierarchical system (281) circulation of power occurs by means of exchange exchange of material goods by legal and illegal means exchange of people by cultural institutions exchange of ideas by discourses
discourses are social languages which create and are created by ideologies discourses allow negotiation of the exchanges of power by establishing categories of regulated behavior and norms for that behavior discourses are in a state of constant dynamic play with each other no monolithic "spirit" controls the discourses of any historical era, though designating a given period an "era" can make it seem as if one did so no totalizing historical explanation can capture all of the dynamic exchange of power because historiography operates within and is a product of the system it tries to describe