Joseph Nye
Robert O. Keohane and Joseph S. Nye, in response to neorealism, develop an opposing theory they dub "complex interdependence." Robert Keohane and Joseph Nye explain, "... complex interdependence sometimes comes closer to reality than does realism." In explaining this, Keohane and Nye cover the three assumptions in realist thought: First, states are coherent units and are the dominant actors in international relations; second, force is a usable and effective instrument of policy; and finally, the assumption that there is a hierarchy in international politics.