Harvard Professor, bestselling author, and founder of Vision & Justice, Sarah Lewis, is bringing to light what has been hidden from view about racial hierarchy in the U.S. in her new illuminating book, "The Unseen Truth: When Race Changed Sight in America."

Sarah joins Sophia to discuss her extensive investigative work that revealed the hidden history of images that changed our perceptions of race. They also discuss the moments in history that have shaped us, how Frederick Douglass' speech on the power of images inspired Sarah's work, and how her near-death experience changed her outlook on life.