My paper can be described in several ways. It is an illustration of something I call rhetorical hermeneutics: the use of rhetoric to practice theory by doing history (Mailloux 1989). It is also part of a larger project on The Ancients and the Postmodem : an argument that much poststructuralist thought in law, critical theory, and other human sciences can be usefully understood as a contemporary reception of classical Greek rhetoric and philosophy (Shankman 1994, Mailloux 1995, Zuckert 1996). In the following remarks, I suggest how Michel Foucault\u27s genealogical work is both derived from and employed in a reading of Plato and Aristotle on justice. Here I use rhetoric (tracing the trope of measurement) to practice a bit of legal theory (c...