It’s not often that you meet someone who actually changes how you see things, someone who changes the way you think about the world. Peter Berg was such a person.

When I fi rst met Peter, in 1979, I didn’t know that he was instrumental in introducing ecology to the American Left. I didn’t know of his pioneering work as a bioregional philosopher-activist with the Planet Drum Foundation. I didn’t know that he had written and directed plays for the San Francisco Mime Troupe and that he had coined the phrase “guerrilla theater.” I only knew that he had been associated with a group called the Diggers in San Francisco in the mid-1960s.