The Hate Man (born Mark Hawthorne, September 26, 1936 – April 2, 2017) was an American philosopher, activist, and former reporter for The New York Times. His beliefs centered on people being honest about their negative feelings. He was locally famous in Berkeley, California, where he lived since 1973. In the late 1970s he was a regular presence in upper Sproul Plaza on the University of California, Berkeley campus, and often gave speeches in Leopold's fountain. In addition to being known as "Hate Man", he was also called "Berkeley Baby".