The field of international relations is only now beginning to take notice of cognitive models of decision making. Arguing against the trend of adopting formalistic depictions of human choice, Berejikian suggests that international relations and realistic models of human decision making go hand-in-hand. The result is a set of interconnected propositions that provide compelling new insights into state behavior. Utilizing this framework, he discusses the behavior of the United States and Europe in negotiating the Montreal Protocol, a landmark international agreement designed to save the earth's protective ozone shield.