This monograph is a computer printout which presents a final report from an analysis of data on cooperation among 29 regional groupings in over 16,000 dyadic relationships (interactions between two nations). Regional groupings included geographic areas such as Africa and Latin America and international organizations such as the North Atlantic Treaty Organization (NATO), the Organization of American States (OAS), and the Warsaw Pact. Analysis was based on application of distance theory to World Event Interaction Survey (WEIS) conflict data. Distance theory is an analytical approach to the study of international relations which implies that systems can be compared to each other with regard to scores on specific variables and that scores can be measured according to their distance above or below the scores for another system. The major objective of this report was to indicate how cooperation varies across regional groupings and to evaluate the significance that such variation might have. The method involved applying distance theory to various regional groupings and to evaluate the significance that such variation might have. The method involved applying distance theory to various regional groupings and dyadic relationships, generating a model for each nation in the system, and comparing each model to a world model. Variables included level of economic development, power base, mean economic development of nations within a regional group, number and type of cooperative interactions, and regional differences. Findings indicated that economic development is related to cooperation exportation (more developed nations tend to cooperate more often and in more ways), cooperative interactions among nations within a regional grouping tend to exceed chance expectations, the relevance of distance theory for each state varies, and a general world model can be developed from models of individual nations. (DB)