Frederick Douglass, a former slave who became a prominent abolitionist, did not free any slaves directly. His primary role was as an advocate and speaker for the abolition of slavery. Douglass used his powerful oratory and writing skills to influence public opinion and policy against slavery. He worked tirelessly to promote the cause of freedom and equality, but he did not personally liberate slaves. Instead, his efforts contributed to the broader movement that eventually led to the abolition of slavery in the United States.