Thomas Emmet Hayden (December 11, 1939 – October 23, 2016) was an American social and political activist, author, and politician. Hayden was best known for his role as an anti-war, civil rights, and intellectual activist in the 1960s, becoming an influential figure in the rise of the New Left. As a leader of the leftist organization Students for a Democratic Society, he authored the Port Huron Statement, helped lead protests at the 1968 Democratic National Convention, and stood trial in the resulting "Chicago Seven" case.