The document discusses various interpretations of the origins of the Cold War between the United States and Soviet Union. It outlines the orthodox traditional interpretation which attributes responsibility to Soviet aggression, the revisionist interpretation which places more blame on American policies and imperialism, and the post-revisionist interpretation which concludes that both superpowers shared responsibility due to misunderstandings and pursuing their own interests. Historians discussed include Gaddis, Bailey, Feis, Kennan, Williams, LaFeber, Alperovitz, and Kolko.