Haitian filmmaker Raoul Peck’s documentary about the great American author and essayist James Baldwin is neither a biographical film nor a typical talking head documentary, with various experts and narrators explaining to us, the regular people, the importance of the people and events depicted on screen. It’s an essay film, built around notes Baldwin compiled for a project he ultimately abandoned, a personal history of Medgar Evers, Malcolm X and Martin Luther King Jr, African-American activists who were murdered in the few years between 1963 and 1968. Samuel L. Jackson, in a hushed, yet determined voice, narrates Baldwin’s notes, and Peck freely cuts between them, recited over archival footage both past and present, and images of Baldwin himself lecturing, participating in panel discussions, chatting with Dick Cavett and generally just being himself (the fear in his eyes as he drives around Mississippi street with Evers is palpable, as is his anger at being condescended to by an aged white professor on Cavett’s show). The result is a rambling, discursive film that captures the essential genius of Baldwin’s work, the uniqueness of his mind and the eloquence and power of its expression.