Terry Allan Simmons (April 12, 1946 – November 14, 2020) was a Canadian-American lawyer and cultural geographer, and the founder of the British Columbia Sierra Club. In this role, he participated in the Don't Make A Wave Committee, understood as the origin of the environmental organization Greenpeace. Though unnoticed at the time, Simmons' death was subsequently reported by the Canadian Broadcasting Corporation, as well as the French-language Radio-Canada