Book excerpt: His collection of essays by one of medieval studies' most brilliant historians argues that the analysis and critique of biopower, as conventionally defined by Michel Foucault and then widely assumed in much contemporary theory of sovereignty, is a sovereign mode of temporalization caught up in the very time-machine it ostensibly seeks to expose and dismantle. For Michel Foucault, biopower (epitomized in his maxim "to make live and to let die") is the defining sign of the modern, and he famously argued that the task of political philosophy was to cut off the head of the classical (premodern) sovereign, the one "who made die and let live." Entrapped by his supersessionary thinking on the question, Foucault argued that the maxim of "to make live and let die" of modern sovereignty superseded a premodern sovereignty characterized by the contrasting power "to make die and let live." The essays collected in Biddick's book (some reprinted and some published here for the first time) argue that Foucault spoke too soon about the supposed "then" of the classical sovereign and the modern "now, " and this became painfully apparent in his analysis of Nazism in his later lectures, Society Must be Defended. There Foucault groped to articulate an anguishing paradox: How could it be that the Nazis, as the ultimate biopolitical sovereign machine, would insist on an archaic (premodern) mode of sovereignty in their death camps? Here is how he posed the question in that lecture: "How can the power of death, the function of death, be exercised in a political system centered upon biopower?" Foucault left this questionhanging.