While emotions are widely regarded as integral to the "behavioral approach" to International Relations (IR), a host of fundamental problems have delayed the integration of affective influences into traditional models of IR. We aim to integrate affect by focusing on commitment problems, a body of work that contains strong theoretical predictions about how individual decision makers will and should act. Across two lab experiments, we use a novel experimental protocol that includes a psychophysiological measure of emotional arousal (skin conductance reactivity) to study how individuals react to changes in bargaining power. While we find support for one key pillar of IR theory-individuals do reject offers when they expect the opponent's power to increase-we also find that physiological arousal tampers with individuals' ability to think strategically in the manner predicted by canonical models. Our followup experiment mimics the elements of institutional solutions to commitment problems and finds support for their efficacy on the individual level. Our novel findings suggest that when individuals face large power shifts, emotional arousal short-circuits their ability to "think forward and induct backwards," suggesting that emotionally aroused individuals are less prone to commitment problems.Although emotions play an "obvious and omnipresent role in world politics," several factors have delayed IR scholars from integrating affective influences into more traditional frameworks of international relations. 1 First, despite some early forays, emotions seem to have only recently been accepted as part of "mainstream" IR. In this way, the progress in our field has largely mirrored that of psychology, where theories of cognition and processing operated for many decades in isolation from theories of affect. Second has been the practical difficulty of examining emotions, leading to a proliferation of helpful theoretical pieces but little in the way of systematic evidence. 2 While researchers have caught on quickly, the new generation of emotion research in We are especially grateful to Ariya Hagh and Anna Oltman, and the team at the Harvard Decision Science Laboratory for facilitating this research, including