The key advocate for the abolition of slavery in the United States was Frederick Douglass. Born into slavery, Douglass escaped and became a leading voice for the abolitionist movement, eloquently speaking about his experiences and the moral imperative to end slavery. His autobiographies, including "Narrative of the Life of Frederick Douglass," educated the public on the horrors of slavery. A prominent writer and orator, Douglass also advocated for women's rights and equal education, becoming an enduring symbol of resilience in the fight for human rights.