Great Lakes Greenpeace was a non-profit, grassroots environmental organization in East Lansing, Michigan, concerned primarily with the protection of marine mammals, particularly whales. The organization's methods involved education, research, grassroots lobbying, and non-violent direct action. The collection's materials include pamphlets, leaflets, correspondence, and press clippings from the early 1970s to the early 1980s. Much of the correspondence is between representatives of Greenpeace and those in a position to influence policies affecting marine mammals (legislators and corporate officers in the fishing industry).