Over the course of time, gender theory has expanded its field of application. At the beginning of the 1990’s, its focus was upon the possibility of the individual determining his or her own sexual tendencies without having to take account of the reciprocity and complementarity of male-female relationships, nor of the procreative end of sexuality. Furthermore, it was suggested that one could uphold the theory of a radical separation between gender and sex, with the former having priority over the latter. Such a goal was seen as an important stage in the evolution of humanity, in which “a society without sexual differences” could be envisaged.
In this cultural context, it is clear that sex and gender are no longer synonyms or interchangeable concepts, since they are used to describe two different realities. Sex is seen as defining which of the two biological categories (deriving from the original feminine-masculine dyad) one belonged to. Gender, on the other hand, would be the way in which the differences between the sexes are lived in each culture. The problem here does not lie in the distinction between the two terms, which can be interpreted correctly, but in the separation of sex from gender. This separation is at the root of the distinctions proposed between various “sexual orientations” which are no longer defined by the sexual difference between male and female, and can then assume other forms, determined solely by the individual, who is seen as radically autonomous. Further, the concept of gender is seen as dependent upon the subjective mindset of each person, who can choose a gender not corresponding to his or her biological sex, and therefore with the way others see that person (transgenderism). — from “Male and Female He Created Them” (2019)