OK, Cote. I'll answer your question. And then I promise I will stop taking this thread off topic. I'm going to start with gender.
In feminist analysis, gender is considered to be a social construct. Sex, on the other hand, is a biological reality.
So, I am a woman, I am an adult female human being - that is my sex. I have female reproductive organs and XX chromosomes. This is a concrete biological physical reality that varies little from woman to woman.
In feminist analysis, gender is a social construct, it is not a concrete physical reality, it varies enormously within individuals of the same sex and has varied over time, cultures, geography, customs, etiquettes and societies. Gender is considered to be the masculine and the feminine. In patriarchal society, women are feminine and men are masculine - and both groups are socialised to perform gender roles. Put simply, the gender roles are; men/masculinity dominate and women/femininity are dominated. Therefore gender is a hierarchy. It affords differing status depending on whether one is a woman (low status) or a man (high status).
There is no concrete physical biological justification for these status groups. They are dependent on the social construction of gender for their existence.
Now with race it is the same, except that the same word is used for the biological reality and the social construct. It is possible to loosely designate 'biological/physical racial types' to human beings - and that is one meaning of the word race. However 'race' is also used as a social construct - as I said earlier on the thread, here the social construct is 'white' and 'nonwhite'. We have a binary hierarchy, just as we do with masculinity and femininity. This is the social construct - and it is a tool of oppression which allows for nonbiologicaly justified status groups, just as we have with gender. It is an artificial classification of human beings that places white people on the higher rung of the 'white' 'non-white' ladder. It is the artificial non-physical construct that buttresses white supremacy (dominance of white over non-white/white privilege).
And I haven't read this theory in a book. It is my personal opinion drawn by observing the world around me.
Am off out - not ignoring any replies.