Political scientist Lynton Keith Caldwell, a principal architect of the National Environmental Policy Act of 1969 (NEPA) who also is recognized as the “inventor” of the Environmental Impact Statement (or EIS, NEPA's “action forcing” provision), is widely regarded to be one of the twentieth century's most influential scholars in the fields of environmental policy, politics, law, and administration. Indeed, because of his groundbreaking work during the 1960s, he has been credited with founding the new subfield of environmental policy, politics, and administration studies within the wider scope of political science and public administration in the United States. In that period, Robert Bartlett and James Gladden believe that Caldwell “proposed the wholly new field of inquiry now known as environmental policy studies” and that he was “alone in focusing on the distinctive, integrative character of the concept ‘environment’ and its implications for politics, public policy, and public administration.” Harold and Margaret Sprout, the only other political scientists then pursuing a path similar to Caldwell's, share this opinion, writing in 1978, “The long neglect of environmental subjects by academic political scientists [has been] verified … The roster of an interdisciplinary conference, ‘Man's Role in Changing the Face of the Earth’ (1955), sponsored by the Wenner-Gren and National Science Foundations, included no political scientists. Two years later the conference ‘Future Environments of North America’ sponsored by the Conservation Foundation included only one, Professor Caldwell.”