This is one of the most wonderful period pieces ever recorded. It became an anthem to the counterculture. Basically, McKenzie calls people to San Francisco to live free. By the time the song hit the charts, the San Francisco nirvana had run its course.
https://www.youtube.com/watch?v=mJ_WG3d3GL8
https://www.youtube.com/watch?v=mJ_WG3d3GL8
