Frederick Douglass was a famous abolitionist and author of "Narrative of the Life of Frederick Douglass, an American Slave." Born into slavery in Maryland around 1818, he escaped and became a prominent advocate for the abolition movement and equal rights for African Americans. His autobiography detailed his experiences as a slave and eloquently argued against slavery and racism. Douglass's powerful oratory skills and writings significantly impacted public opinion and laid the groundwork for future civil rights movements, making him one of the most influential figures in American history.