Discipline: Political Science
An assumption of fundamental male superiority.
The observable differences between men and women are neither accidental nor socially constructed but are the expression of fundamental and immutable differences which justify the different treatment of men and women and the privileges of the former.
Sexism is normally an implication underlying many different theories rather than an articulated argument in itself.
Susan Moller Okin, Women in Western Political Thought (Princeton, 1979)