In many ways the study of international integration is in what Thomas Kuhn has called the pre-paradigm stage of the development of science. This stage is characterized by disagreement on the entities to be studied and the definitions, concepts, and indicators to be employed. Controversy is widespread even on the simplest of issues and, what is more discouraging, this controversy does not take place in a theoretical-methodological context which facilitates its resolution. There is a general lack of common standards by which to evaluate knowledge, decision-rules to interpret evidence, and criteria to measure progress. Thus, what constitutes advance for one school may mean retreat for another, and efforts to exchange views and harmonize aims frequently only serve to further define existing cleavages. Given this disagreement on broad philosophical issues it should not be surprising that research efforts and presentations of “evidence” have had little compelling impact in altering theoretical convictions. It is also no accident that the two most promising efforts to date are not presentations of data but are attempts to fashion a generally acceptable framework within which to evaluate evidence. Leon Lindberg has urged the adoption of a systems perspective which would harmonize a variety of research efforts and would, as well, make findings roughly comparable. Joseph Nye has suggested that we must “disaggregate” the concept of integration before we can meaningfully answer the important questions facing us. I have already indicated how complementary Lindberg's and Nye's suggestions are, and I feel that implementation of their suggestions would aid in making research findings touch base with one another and thus impart to evidence its proper multiplying effect.