How does Fuller develop an argument for women's rights?

Yet, then and only then will mankind be ripe for this, when inward and outward freedom for Woman as much as for Man shall be acknowledged as a right, not yielded as a concession. As the friend of the negro assumes that one man cannot by right hold another in bondage, so should the friend of Woman assume that Man cannot by right lay even well-meant restrictions on Woman. If the negro be a soul, if the woman be a soul, apparelled in flesh, to one Master only are they accountable.

How does Fuller develop an argument for women's rights?

by insisting that everyone with a soul deserves rights