A revised list of independent states since the congress of Vienna

We examine the criteria for membership in the international system as applied in the widely employed system membership list maintained by the Correlates of War Project. Some problems with existing classifications are illustrated and some analytical and empirical consequences of these problems are detailed. Using updated criteria and information, we develop a revised and updated list of the composition of the international system of nation state actors in world politics from the Congress of Vienna to the present. © 1999 OPA (Overseas Publishers Association) N.V. Published by license under the Hardwood Academic Publishers imprint, part of The Gordon & Breach Publishing Group.