Ƙungiyar ta kafa hukuma a watan Janairu 1935 don jagorantar kare kariya.
Tabbas, wani nau'i mai rikitarwa na jumla shine "An kafa kungiyar a cikin Janairu 1935 don jagorantar kare kariya ta daji kuma ya hada da masu kiyayewa kamar Bob Marshall, Benton MacKaye, Bernard Frank da Aldo Leopold. "