Women’s morality differs from men’s. Feminist philosopher Carol Gilligan argues women are motivated more by care than duty, and inclined more to emphasise responsibilities than rights. They seek reconciliation through the exercise of compassion and negotiation rather than demanding "justice", through force if necessary.
While the idea has widespread appeal, empirical research has failed to find large differences in the way men and women think about morality. Psychologist Janet Shibley Hyde argues that a "consequence of his overinflated claim of gender differences is that it reifies the stereotype of women as caring and nurturant and men as lacking in nurturance" (pdf). Research suggests that women who violate the stereoptype of being caring nurturant can find themselves penalised in the workplace.
American psychologist Jonathan Haidt argues that there is much more to morality than concerns about care and justice. He lists five sets of moral intuitions: Harm/care, Fairness/reciprocity, Ingroup/loyalty, Authority/respect, and Purity/sanctity (pdf). According to Haidt and his colleagues, some of the biggest differences in how people think about moral issues are between liberals and conservatives rather than between men and women.
(Hat tip: Mindy at Hoyden About Town).