He is a philosopher and developed much of his career at the University of Oxford. It was Mistress of Girton College, Cambridge, where he is a life member since 1985. As director of the Commission of Inquiry into Human Fertilisation and Embryology collaborated in the report served as the basis of legislation in the UK. She is the author of the Imagination, Memory, Existentialism, An Intelligent Person's Guide to Etics and Mary Warnock works: A Memoir