Carol Gilligan is a psychologist known for her work on moral development and gender differences. She received her BA from Swarthmore College and PhD from Harvard University. Gilligan taught at Harvard and Cambridge and developed a theory that moral development progresses differently in women than men. Her work challenged Lawrence Kohlberg's theory of moral development for being biased against recognizing differences in female psychology and experience. While praised for bringing awareness to gender differences, some like Cristina Hoff Sommers have criticized Gilligan's work for relying on anecdotal evidence rather than empirical data.