Linda Ruiz-Lozito: Sojourner Truth. She fled slavery with the help of Quaker friends, and in middle age became a traveling preacher of uncommon power. She was illiterate but had much of the Bible committed to memory. At a women’s rights convention in Ohio, she was discriminated against by white feminists and pointedly asked, “Ain’t I A Woman?” It’s one of the most famous speeches in American history.