A central tenet of modern feminist thought has been the assertion that "all women are oppressed." This assertion implies that women share a common lot, that factors like class, race, religion, sexual preference, etc. do not create a diversity of experience that determines the extent to which sexism will be an oppressive force in the lives of individual women.
Feminist Theory: From Margin to Center (ed. Routledge, 2014) - ISBN: 9781317588337