Lillian Susan Harman (married name Harman O'Brien; December 23, 1869 – 1929) was an American sex radical feminist and editor. Her father Moses Harman edited Lucifer, the Light-Bearer, a regional, weekly paper that introduced her to issues of women's sexual freedom. She became a national icon for that cause following her "free marriage", which took place outside state and church recognition, and her subsequent imprisonment. Upon her release, Harman edited multiple publications, including an anarchist periodical with her husband. Her work culminated with her being named president of a British organization that campaigned to legitimize non-marital sex. Her first child was born under a contract that stipulated the father's responsibilities in supporting the daughter. She moved from Kansas to C