Colletti started to be known outside Italy because of a long interview that Marxist historian Perry Anderson published in the New Left Review in 1974.
His father, James Carew O'Gorman Anderson (1893–1946), known as Shaemas, an official with the Chinese Maritime Customs, was born into an Anglo-Irish family, the younger son of Brigadier-General Sir Francis Anderson, of Ballydavid, County Waterford.
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