Parity of the Sexes

Sylviane Agacinski has never shied away from controversy. Vilified by some—including many feminists—and celebrated by others as a pioneer of gender equality, she has galvanized the French political scene. Her articulation of the theory of "parity" helped inspire a law that went into effect in May 2000 requiring the country's political parties to fill 50 percent of the candidacies in every race with women.

Sylviane Agacinski, according to The New Yorker, "is sometimes credited with making par...