The pivotal figure in American history known for their anti-slavery speeches is Frederick Douglass. An escaped slave, Douglass became a prominent orator, writer, and social reformer in the 19th century. His powerful speeches and writings advocated for the emancipation of enslaved people, civil rights, and equality. Douglass's memoir, "Narrative of the Life of Frederick Douglass," highlighted the brutal realities of slavery and became a seminal work in abolitionist literature. His efforts significantly contributed to the anti-slavery movement and continue to inspire modern activism.