Third-wave feminism is a feminist movement that began in the early 1990s, prominent in the decades prior to the fourth wave. Grounded in the civil-rights advances of the second wave, Gen X third-wave feminists born in the 1960s and 1970s embraced diversity and individualism in women, and sought to redefine what it meant to be a feminist. The third wave saw the emergence of new feminist currents and theories, such as intersectionality, sex positivity, vegetarian ecofeminism, transfeminism, and postmodern feminism. According to feminist scholar Elizabeth Evans, the "confusion surrounding what constitutes third-wave feminism is in some respects its defining feature."
The third wave is traced to the emergence of the riot grrrl feminist punk subculture in Olympia, Washington, in the early 1990s, and to Anita Hill's televised testimony in 1991 (to an all-male, all-white Senate Judiciary Committee) that African-American judge Clarence Thomas had sexually harassed her. The term third wave is credited to Rebecca Walker, who responded to Thomas's appointment to the Supreme Court with an article in Ms. magazine, "Becoming the Third Wave" (1992). She wrote:
So I write this as a plea to all women, especially women of my generation: Let Thomas' confirmation serve to remind you, as it did me, that the fight is far from over. Let this dismissal of a woman's experience move you to anger. Turn that outrage into political power. Do not vote for them unless they work for us. Do not have sex with them, do not break bread with them, do not nurture them if they don't prioritize our freedom to control our bodies and our lives. I am not a post-feminism feminist. I am the Third Wave.
Walker sought to establish that third-wave feminism was not just a reaction, but a movement in itself, because the feminist cause had more work ahead. The term intersectionality—to describe the idea that women experience "layers of oppression" caused, for example, by gender, race and class—had been introduced by Kimberlé Crenshaw in 1989, and it was during the third wave that the concept flourished.