The poliheuristic theory of decision (PH) is placed in its proper historical context through a brief diachronic overview of the evolution of the foreign policy decision-making tradition from Snyder, Bruck, and Sapin to the present. The PH program is examined and contextualized in synchronic fashion via juxtaposition with three parallel lines of theoretical and empirical foreign policy decision-making research: cognitive institutionalism, problem representation, and decision units. These approaches are found to exhibit different methodological strengths and weaknesses and to emphasize different aspects of the decision-making process. Substantial complementarities exist, suggesting that the potential for synergy and cross-fertilization is great.