A factor analysis and orthogonal rotation has been carried out on data for the mid-1950's for 94 variables and 82 nations. The results can be put in several propositions: 1. Many activities of nations are highly correlated with each other and can be structured meaningfully in terms of several independent (uncorrelated) dimensions. 2. Many diverse international activities of nations form independent patterns of relationships that can be identified as participation, conflict, aid, ideology, popularity, South American, and migration dimensions. 3. Basic indicators that index some of the independent clusters of relationships among the many diverse activities of nations are trade, threats, technical assistance and relief fellow ships received, net percent UN votes for the US, ratio of visitors to population, air distance from the US, and ratio of immigrants to population. 4. The magnitude of participation by a nation in the international system is a result of its economic development and power capability. Its conflict behavior is a phenomenon dependent on its relation to other nations.