The book The Greenpeace Story, states that Greenpeace co-founder Bob Hunter was given a copy of Warriors of the Rainbow by a wandering dulcimer maker in 1969 and he passed it around on the first expedition of the Don't Make a Wave Committee, the precursor of Greenpeace.
According to the book "The Greenpeace Story," Bob Hunter, co-founder of Greenpeace, received a copy of "Warriors of the Rainbow" from a traveling dulcimer maker in 1969 and shared it with the first members of the Don't Make a Wave Committee, which was the precursor to Greenpeace.