*First line is the artist name. 1967. Quintessential 60s hippie/flower child song. It was written by John Phillips and Lou Adler to promote the Monterrey International Pop Music Festival. held in June of 1967. This song has been called "the unofficial anthem of the counterculture movement of the 1960s, including the Hippie, Anti-Vietnam War and Flower power movements." The song has also been widely regarded as a defining song of the Summer of Love. The song is credited with bringing thousands of young people to San Francisco during the late 1960s.