Starting from President James Monroe in December 1823 till Donald Trump in 2025, policy statements from different American presidents from time to time have been attributed as doctrines.

According to AI, "Presidential doctrines in US foreign policy are major, overarching policy stances or strategies announced by a president, often shaping the nation's approach to international relations for a significant period. These doctrines are not legally binding but reflect a president's vision for the world and guide their actions on the global stage. They often emerge in response to specific geopolitical situations and can have lasting impacts on US foreign policy."

Major US doctrines proclaimed by various American Presidents like Monroe, Truman, Eisenhower, Carter, Bush, Clinton, Obama, Biden and Trump reflected major policy statements of US administration on foreign policy matters.

How various American presidents after Second World War influenced the world through their doctrines indicated cold war and post-cold war realities. Trump Doctrine 2.0 is a recent phenomenon which was proclaimed in his second term following a set of events like the Russia-Ukraine War, the War in Gaza, and the Indo-Pak armed conflict of May 7-10 and the Israel-Iran war. Trump Doctrine, proclaimed in his first presidency, focused on accomplishing his objective enshrined in 'Make America Great Again', but the doctrine declared in his second term covered a wide range of international issues. After assuming power on January 20, 2025 Trump came up with strange type of ideas like getting hold of Greenland; making Canada the 51st........

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