As a Black woman raised in segregated North Carolina, Nina Simone was no stranger to injustice. She went on to become an award-winning singer and pianist, and also fought for civil rights throughout her life. She muses on the concept of freedom in the 1970 documentary “Nina: A Historical Perspective.” When asked how she defines “free,” she calls it “a feeling.” She points out how hard it is to put it into words, before settling on a beautiful, simple definition: “no fear.”