Ms. is an American feminist magazine co-founded in 1971 by journalist and social/political activist Gloria Steinem. It was the first national American feminist magazine. The original editors were Letty Cottin Pogrebin, Mary Thom, Patricia Carbine, Joanne Edgar, Nina Finkelstein, Mary Peacock, Margaret Sloan-Hunter, and Gloria Steinem. Beginning as a one-off insert in New York magazine in 1971, the first stand-alone issue of Ms. appeared in January 1972, with funding from New York editor Clay Felker. It was intended to appeal to a wide audience and featured articles about a variety of issues related to women and feminism. From July 1972 until 1987, it was published on a monthly basis. It now publishes quarterly.

Feminism is a range of socio-political movements and ideologies that aim to define and establish the political, economic, personal, and social equality of the sexes. Feminism holds the position that modern societies are patriarchal—they prioritize the male point of view—and that women are treated unjustly in these societies. Efforts to change this include fighting against gender stereotypes and improving educational, professional, and interpersonal opportunities and outcomes for women.