Small States and Security Regimes argues that, contrary to the mainstream theories of international regime formation, small states do often play an important role in international politics. Masker first uses some of the insights of international regime theory to analyze the nuclear-free zone movement. His second objective is to explain why Australia and New Zealand, otherwise loyal allies of the U.S., defied the will of the American leadership and created a regional nuclear-free zone in 1985 while Denmark and Norway rejected the Finnish proposal of a similar Nordic non-proliferation regime.