In this lesson, you analyzed how Frederick Douglass presented an argument in "Letter from Frederick Douglass to Harriet Tubman." You noticed how he developed his claim that Tubman was one of the most influential abolitionists. Think about the additional information you learned about Tubman and the abolitionist movement in Adler's text. Based on your readings today, how does one know when they have made a difference for others or left a strong legacy? Why is it important for authors to justify claims?