Since the beginning of psychology, the link between sex categories and
feminine and masculine psychological characteristics has been a highl
y controversial issue, which has regularly appeared in both popular sc
ience and general public publications. Following the research of the s
eventies, the necessary dissociation of sex and gender became widely a
ccepted. But probably due in part to the current social crisis, we are
seeing a resurgence of the belief that the feminine and masculine nat
ures are irreducibly different. This idea is based on a strict, biolog
ical dichotomy which denies virtually all social determinants. The aim
of the present paper is threefold: (1) to show how this social ideolo
gy is in fact only supported by a selection of scientific arguments, (
2) to discuss the ideological function of these deviations and resulti
ng distortions, and (3) to attempt to pinpoint the roots and/or echoes
of this social discourse in the recent scientific literature.