In 1948, Moss Kendrix, a former New Deal public relations officer, founded a highly successful, Washington, D.C.-based public relations firm, the flagship client of which was the Coca-Cola Company. As the first black pitchman for Coca-Cola, Kendrix found his way into the rarefied world of white corporate America. His personal phone book also included the names of countless black celebrities, such as bandleader Duke Ellington, singer-actress Pearl...