Dr. Michael Grahame Moore is Professor Emeritus of Education at the Pennsylvania State University. He is known for his major contributions to the field of distance education. In 1972, he published his first statement of theory. His theory stated that "distance education is not simply a geographical separation of learners and teachers, but, more importantly, is a pedagogical concept". After approximately 11 years, Moore was finally able to put a name to his theory; Transactional Distance Theory.