Sissela Bok (born Sissela Myrdal on 2 December 1934) is a Swedish-born American philosopher and ethicist, the daughter of two Nobel Prize winners: Gunnar Myrdal who won the Economics prize with Friedrich Hayek in 1974, and Alva Myrdal who won the Nobel Peace Prize in 1982.She received her B.A. and M.A. in psychology from George Washington University in 1957 and 1958, and her Ph.D. in philosophy from Harvard University in 1970.