His song is one of the enduring anthems of the turbulent 1960s, a soulful call to action awash in a psychedelic wave of sound.
It has appeared in more than 100 movies and TV shows, even a multimillion-seller video game, and has been covered by artists from Sheryl Crow to Joan Jett to The Ramones.
So, decades later, what does Lester Chambers have to show for "Time Has Come Today"?
So little that, early this year, the 72-year-old found himself posting a photo online. In it, he held a poster declaring that he was living on Social Security and charity, having gone nearly 30 years before seeing his first, paltry royalty check.
The poster was taped to one of his gold records.
"It's been a long journey," said Chambers, who said he never blew his money on drugs or booze like so many artists before and after. "I have not understood what happened yet and how it happened."
But now, through a series of events only possible in the digital age, he's getting a chance to start again -- this time making and selling music on his own terms.
"We've got a lawyer now," Chambers said. "It's called the computer."
"Time Has Come Today" was a pop hit for The Chambers Brothers, spending five weeks on the Billboard Hot 100 chart in 1968 and peaking at No. 11. The group, which shared the stage with the likes of Jimi Hendrix, Janis Joplin and The Doors, would fail to match its success again .
But it became emblematic of the political and social upheaval of the late '60s and would be used for decades to invoke the spirit of that era. As recently as last year, it was used in a pivotal scene in "Homefront," a military-style video game that has sold somewhere around 3 million copies.