Robin Morgan and Marcia Ann Gillespie served respective terms as Editors in Chief of the magazine. Gillespie was the first African American woman to lead Ms. For a period, the magazine was published by MacDonald Communications Corp., which also published Working Woman and Working Mother magazines. Known since its inception for unique feminist analysis of current events, its 1991 change to an ad-free format also made it known for exposing the control that many advertisers assert over content in women's magazines.