Complex sentence: Participants of the Women's Movements and feminist thinkers have demonstrated that family forms are socially and historically constructed, not monolithic universals that exist across time and space, and that family arrangements are not the normal result of biological differences between women and men.
Split into simpler sentences: Participants of the Women's Movements and feminist thinkers have demonstrated that family forms are socially and historically constructed, not monolithic universals that exist across time and space. Nor are family arrangements a normal result of biological differences between women and men.