In WR 309 we published a contribution from one of our close sympathisers (‘Baboon'):  ‘Baboon's revenge: marxism versus feminism on the origins of humanity', a report of a meeting presented by Chris Knight of the Radical Anthropology Group at the Anarchist Bookfair in London last October.Baboon's article is very critical of Knight's basic thesis, rejecting it as anarchist and feminist. Having recently read Chris Knight's major theoretical work Blood Relations: Menstruation and the origins of Culture (Yale University press, 1991), I feel that his work deserves rather more consideration, even if some of Baboon's key criticisms certainly express valid concerns.