Commentators on the work of Catharine Macaulay acknowledge her influence on the pioneering feminist writing of Mary Wollstonecraft. Yet despite Macaulay's interest in equal education for women, these commentators have not considered that Macaulay offered a self-contained, sustained argument for the equality of women. This paper endeavors to show that Macaulay did produce such an argument, and that she holds a place in the development of early feminism independent of her connections with Wollstonecraft.