Ms. is an American feminist magazine co-founed by American feminist and activist Gloria Steinem and founding editor Letty Cottin Pogrebin that first appeared in 1971 as an insert in New York magazine. The first stand-alone issue appeared in January 1972 with funding from New York editor Clay Felker. From July 1972 to 1987 it appeared on a monthly basis. During its heyday in the 1970s it enjoyed great popularity, but was not always able to reconcile its ideological concerns with commercial considerations. Since 2001, the magazine has been published by the Feminist Majority Foundation, based in Los Angeles and Arlington, Virginia.