(b Cairo, 28 Feb. 1935). British-born abstract sculptor, writer on art, and teacher who settled in the USA in 1976 and later became an American citizen. In 1965 he was among the artists included in the New Generation exhibition at the Whitechapel Art Gallery, London, which marked the emergence of a new British sculptural avant-garde inspired by his teacher Anthony Caro. His work is in various materials and often makes striking use of colour. In 1974 he published The Language of Sculpture and in 1975 he organized a major Arts Council exhibition at the Hayward Gallery, London, entitled ‘The Condition of Sculpture’.