Undoubtedly his most famous song was this protest song against US involvement in the Vietnam War. Showcased at Woodstock, this song also expresses the band's cynicism about the business aspect of war production.
"Come on Wall Street don't be slow...he sings
"There's plenty of money to be made
Supplying the army with the tools of the trade."
This band started at Berkeley, with the Free Speech Movement against the war. Bill Belmont gives a brief historical context.