Political philosopher Charles Mills died on September 20. Mills was a major figure in philosophy for bringing white supremacy to the fore in his work, changing the way we speak about race. Reema Rattan talks to race scholar Debbie Bargallie, who used Mills' work extensively in her book Unmasking the Racial Contract: Indigenous voices on racism in the Australian Public Service, and philosopher Helen Ngo about his work, legacy and the relevance of his ideas in Australia.