Betty Friedan (February 4, 1921 – February 4, 2006) was an American feminist writer and activist. A leading figure in the women's movement in the United States, her 1963 book The Feminine Mystique is often credited with sparking the second wave of American feminism in the 20th century. In 1966, Friedan co-founded and was elected the first president of the National Organization for Women (NOW), which aimed to bring women "into the mainstream of American society now [in] fully equal partnership with men."
In 1970, after stepping down as NOW's first president, Friedan organized the nationwide Women's Strike for Equality on August 26, the 50th anniversary of the Nineteenth Amendment to the United States Constitution granting women the right to vote. The national strike was successful beyond expectations in broadening the feminist movement; the march led by Friedan in New York City alone attracted over 50,000 people.
In 1971, Friedan joined other leading feminists to establish the National Women's Political Caucus.