Sarah Moore Grimké was the author of the first developed public argument for women's equality in the United States. Letters on the Equality of the Sexes (1838) presented Grimké's self-taught feminist perspective on slavery, religion, and the rights of African Americans and women of all classes and espoused a vision of human equality and individual worth. Grimké's beliefs placed her outside the prevailing moral codes of her time and served as the basis for her lifelong struggle to emancipate herself and American society from the bondage of slavery, "unChristian" Christian churches, and prejudice against people of color and white women. An intellectually complex, self-taught, and self-liberating woman, she prefigured in her life and writing the arguments and struggles of late twentieth-century feminists. Her writing and work in the causes of abolition and women of the 1830s gave the nineteenth-century woman's suffrage workers Abby Kelley...