Although the difference between the sexes is not the subject of thematic texts from Plato to today, it can be read between the lines. If philosophical activity depends on desire, how then to understand this presence-absence of the difference of the sexes in the philosophical text? And will there not be, from modern times, a new use of the difference between the sexes that philosophers would not have evaluated? The answers to these questions can be found in Geneviève Fraisse's book, through an impeccable analytical work that raises the historicity of "the difference between the sexes" as a different way of approaching an old problem.