Mario Savio was an American activist and a key member of the Berkeley Free Speech Movement. He is most famous for his passionate speeches, especially the "Bodies Upon the Gears" address given at Sproul Hall, University of California, Berkeley on December 2, 1964.

The Free Speech Movement (FSM) was a massive, long-lasting student protest which took place during the 1964–65 academic year on the campus of the University of California, Berkeley. The Movement was informally under the central leadership of Berkeley graduate student Mario Savio. Other student leaders include Jack Weinberg, Tom Miller, Michael Rossman, George Barton, Brian Turner, Bettina Aptheker, Steve Weissman, Michael Teal, Art Goldberg, Jackie Goldberg and others.