He was the son of Lieut Col. C. A. Madge and Barbara, née Hylton Foster, and the brother of the sociologist John Madge who wrote The Origins of Scientific Sociology.
Cyril Bibby comments with reference to them as well as Maurice Dobb, the twins Francis and Roualeyn Cumming-Bruce, Margot Heinemann and "the beautiful Eileen Wynne" that "it was noticeable how many of these extreme left-wingers came from privileged upper-class homes" (Reminiscences of a Happy Life, p.171)
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