Sissela Bok (born Myrdal; 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 is considered one of the premier American women moral philosophers of the latter part of the 20th century.
She worked at Simmons University (1971–72), the Harvard-MIT Program in Health Sciences and Technology (1975–82), Brandeis University (1985–92), and the Harvard Center for Population and Development Studies at the Harvard School of Public Health (1993–2022).
Her brother, Jan Myrdal, was a political writer and journalist.
Bok was awarded the Courage of Conscience award on 24 April 1991 "for her contributions to peacemaking strategies in the tradition of her mother.