Morgenthau and Niebuhr among leading post war realists explain IR with human nature.

Wallerstein, Galtung and Modelski are well known scientists and made real contribution for dependency theories or theories of structural Marxism.

Joseph S. Nye, Robert O. Keohane, Richard W. Mansbach and John A. Vasques who agreed with the description of David Easten for politics as authoritative allocation of values claimed the necessity of changes in the statecentric paradigm.