What message does the "Green Book" tell us？

The film examines the history of racial prejudice in America, showing the ways that institutions and people can think they are progressive when they are in fact holding onto racist and bigoted beliefs. It also seeks to challenge different preconceptions and stereotypes about race; for instance, Tony is surprised to hear that Don does not know popular black music of the era, nor has he ever had fried chicken, a stereotypically black food item. Through the lens of the driver and his boss' friendship, the audience sees many perspectives on the subject of race, and the film seeks to depict the American quest for racial equality.