In 1993, John Fien wrote Education for the Environment: Critical Curriculum Theorizing and Environmental Education. Applying a critical perspective to his own ideas, he concluded the book with an examination of three criticisms that deep ecologists would make of critical environmental education. Acknowledging the validity of much of their case, he concluded that the critical curriculum theory of education for the environment proposed in the book was an incomplete one, and that “more theorizing, reflection, action, and more reflection again” would be necessary to develop the ideas more fully than they were. In this paper, which was the Professorial Lecture he presented on 14 May 2003, he returned to this task seeking to broaden the theoretical frameworks of environmental education to encompass deep and wide caring for human and non-human nature.