How might one bring international relations (IR) and comparative politics (CP) observations into the public policy (PP) literatures predominant intellectual framing of policy, in which the normal analytical unit is a specific policy sector or type of regulatory institution? This article offers a practical framework to incorporate IR and CP directly into PP analyses. We present theory and methods for composing carefully structured, multiyear, analytical policy sector histories, suitable for international and comparative PP analysis, particularly when the research goal implies policy sector comparisons across wide variations of geography, culture, income, or historical epoch. Concretely, we propose two models, called the Leader State Framework in the case of international policy and the Varieties of Political Regimes Approach for policy at the national level, which should help policy analysts utilize important observations related to our disciplines understanding of the diverse host political systems within which policy sectors are embedded.