Thomas Oden completed his doctoral thesis at Yale in 1960. It was directed by H Richard Niebur and compared the ethics of Karl Barth and Rudolf Bultmann. A portion of the thesis was published by Westminster Press in 1964 under the title Radical Obedience: The Ethics of Rudolf Bultmann. This file contains correspondence related to the thesis manuscript. In addition to letters written by Oden himself, the archive also contains notes and letters by Markus Barth and Art Cochrane. While digital back-up copies of the Barth and Cochrane materials have been made for purposes of preservation in the event of catastrophic loss, due to copyright restrictions they will not be accessible to the public in digital format until the year 2084. Those wishing access to any materials that are in embargo in digital version are welcome to make an appointment with the Divinity Library to view the originals.