Conversation with Kenneth N. Waltz, cover page: Harry Kreisler interviews Kenneth Waltz on International Relations Theory: February, 2003.Kenneth Waltz, "The Spread of Nuclear Weapons: More May Better": Published in 1981 in Adelphi Papers, Number 171.The Six Principles of Political Realism: Taken from Hans Morgenthau's "Politics Among Nations," this is one of the first systematic explanations of the principles of international relations.Theories of International Relations - Realism: Bibliography from the International Relations Resource Center.