Write a historical theory on Global Politics. 1- According to just war theory, what constitutes a morally defensible war? How might we assess the United States’ involvement in World War II according to this theory? How about the Vietnam War? discuss all three elements of this theory in your answer. Also, be sure to include insights from “The Fog of War” and “No End in Sight.”2- How does international relations theory help explain the United States’ prosecution of the War on Terror since the 9/11 attacks? Be sure to include a discussion of the Afghanistan and Iraq Wars in your answerThe following readings and videos will be included and used by the writer to answer the previous questions. Barry Gewen, “The Book That Shaped Foreign Policy for a Generation Has More to Say” included as a file.Joyce Kaufman, A Concise History of U.S. Foreign Policy (fourth edition)- I don’t have this but if reviews are used please cite them.“The War Behind Closed Doors” (Frontline documentary about the neo-conservatives)- https://www.pbs.org/video/frontline-war-behind-closed-doors/“The Fog of War” (documentary directed by Errol Morris)- https://documentaryheaven.com/the-fog-of-war/“No End in Sight” (documentary directed by Charles Ferguson)- https://watchdocumentaries.com/no-end-in-sight/