Make them free, and they will quickly become wise and virtous, as men become more so; for the improvement must be mutual, or the injustice which one half of the human race are obliged to submit to, retorting on their oppressors, the virtue of men will be worm-eaten by the insect whom he keeps under his feet

A Vindication of the Rights of Woman: With Strictures on Political and Moral Subjects (ed. 1793)