Disliked by his contemporaries yet valued by historians, Truman is now believed to be one of the best Presidents the USA has had. He presided over or was directly responsible for many first steps of the Cold War, such as the Marshall Plan, the creation of NATO, the Korean War, and the Berlin Airlift.
WI Truman just didn't exist? What would US policy look like and how would the first few years of the Cold War play out?