Judith Butler (born February 24, 1956) is an American philosopher. She was born in Ohio. She got her PhD in philosophy from Yale University in 1984. She lives in Berkeley, California, with her partner Wendy Brown. In 1990 her book "Gender Trouble" was published by Routledge. It is considered an important work in modern feminism. In the book Butler talks about her theory of gender performativity, which is that gender, along with sex and sexuality, is something you "perform" rather than an expression of human biology. In other politics, she has supported Palestine and the Democratic Party, including Hillary Clinton and Kamala Harris.