Ranginui Joseph Isaac Walker DCNZM (1 March 1932 – 29 February 2016) was an influential New Zealand academic, author, and activist of Māori and Lebanese descent. "I think he was the Māori commentator for a very long period," his biographer, Professor Paul Spoonley, has said. Walker wrote about the struggles for Māori land rights and cultural identity and, says Spoonley, "confronted Pakeha about their lack of understanding and prejudices to Māori" in his books and regular columns for the weekly New Zealand Listener and the monthly Metro magazine throughout the 1980s and 90s.