Was an important African American leader of the abolitionist movement. As a former , he had experienced first hand the cruelty of slavery. He went on to write

Frederick Douglass

Explanation:

Frederick Douglass, in his early age, experienced first-hand cruelty of slavery. He escaped from slavery when he was twenty-one and moved to Massachusetts. Douglass became an author, activist, and public speaker who spoke against the practice of slavery in America. He became a leader in the abolitionist campaign, which attempted to end slavery before and during the Civil War in America. Douglass wrote several autobiographies which received national attention. Narrative of the Life of Frederick Douglass and My Bondage and My Freedom was his famous work.

d.prevent the spread of communism outside of eastern europe.