For many years now, and the US rule ideology called “intersezionismo”. Like many things that spread and claim to be “scientific”, also intersezionismo (or instersezionalità) are based on a theory “not exactly scientific,” a bit like all the theories on the construction of thousands of “genders” are based on a theory that comes from the humanistic world, and is passed off as “scientific.”
You can read the origin of this theory here: https: // en.