Book excerpt: Agacinski's articulation of the theory of "parity" helped inspire a law that went into effect in May 2000 requiring France's political parties to fill 50 percent of the candidacies in every race with women. Agacinski's model of parity does not strive for the nebulous ideal of "equality" between the sexes; instead, it demands a concrete formula for political contests: an equal number of female and male candidates in every election. This theory that has sparked impassioned debate across France and around the globe.