American criminal and cult leader whose followers carried out several notorious murders in the late 1960s. Their crimes inspired the best-selling book Helter Skelter (1974).

Manson was born to a 16-year-old girl and a man he would never know. After his mother was imprisoned for armed robbery, he lived with an aunt and uncle in West Virginia. Beginning at age nine, he spent much of his life in juvenile reformatories or in prison for crimes that included petty larceny, armed robbery, burglary, and auto theft.

Following his release from prison in 1967, Manson moved to San Francisco, where he attracted a small but devoted group of followers from among the city's bohemian youth culture. By 1968 he had become the leader of the “Family,” a communal religious cult dedicated to studying and implementing his eccentric religious teachings, which were drawn from science fiction as well as the occult and fringe psychology. He preached the coming of an apocalyptic race war that would devastate the United States and leave the Family in a position of dominant power.

Manson's hold over his followers was graphically illustrated in 1968–69, when the Family carried out several murders on Manson's orders. The most famous victim was actress Sharon Tate, wife of motion-picture director Roman Polanski (Polanski, Roman), who was killed in her Los Angeles home along with three guests. The ensuing trial of Manson and his followers in 1970 attracted national attention. In 1971 Manson was sentenced to death, but, following the abolition of capital punishment in California in 1972, his sentence was commuted to life in prison.