Since the mid 70s, Dr. Clark has been leading the development of the Internet; from 1981-1989 he acted as Chief Protocol Architect in this development, and chaired the Internet Activities Board. His current research looks at re-definition of the architectural underpinnings of the Internet, and the relation of technology and architecture to economic, societal and policy considerations. He is technical director of the MIT Internet Policy Research Initiative at CSAIL. He is helping the U.S. National Science foundation organize their Future Internet Architecture program. He is past chairman of the Computer Science and Telecommunications Board of the National Academies, and has contributed to a number of studies on the societal and policy impact of computer communications. He was elected to the American Academy of Arts and Sciences in 2002 and serves as a member of its Council.