Environmental adult education (EAE) combines environmental education and adult learning theory to provide meaningful educative experiences to learners with the purpose of bringing about genuine environmental change. The field is relatively new, but its body of literature is growing in the twenty-first century. This paper conducts an historical analysis of EAE literature to date. The resulting summary provides scholars and practitioners in the fields of environmental adult education, environmental education, and adult education a platform to engage in dialogue about future directions for the field based on historical trends and lessons.