The major debate on the issue has been between Kenneth Waltz, the founder of neorealist theory in international relations, and Scott Sagan, a leading proponent of organizational theories in international politics. Waltz generally argues that "more may be better" and contends that new nuclear states will use their acquired nuclear capabilities as nuclear deterrence and thus preserve peace. Sagan argues that "more will be worse" since new nuclear states often lack adequate organizational controls over their new weapons, which makes for a high risk of deliberate or accidental nuclear war or of theft of nuclear material by terrorists to perpetrate nuclear terrorism.