Frederick Douglass was the prominent abolitionist leader advocating for the end of slavery in the United States during the 19th century. An escaped slave, Douglass became a powerful orator, writer, and social reformer who used his compelling life story to highlight the injustices of slavery. His publications, including his autobiography, "Narrative of the Life of Frederick Douglass," effectively communicated the horrors of enslaved life and the necessity of emancipation. Douglass was also active in other civil rights issues, contributing significantly to the broader struggle for freedom and equality for all African Americans.