Frederick Douglass was the famous American abolitionist known for his impactful speeches and writings against slavery. Born into slavery around 1818, Douglass escaped to freedom and became a leading voice in the abolitionist movement. His autobiographies, including "Narrative of the Life of Frederick Douglass, an American Slave," detailed his life experiences and illuminated the brutal realities of slavery. Douglass advocated for not only the emancipation of enslaved individuals but also for civil rights for African Americans and women's suffrage. His eloquence and powerful advocacy significantly influenced public opinion and policy regarding slavery in the United States during the 19th century.