Harry S. Truman became President of the United States with the death of Franklin D. Roosevelt on April 12, 1945. During his nearly eight years in office, Truman confronted enormous challenges in both foreign and domestic affairs. Truman's policies abroad, and especially toward the Soviet Union in the emerging Cold War, would become staples of American foreign policy for generations. At home, Truman protected and reinforced the New Deal reforms of his predecessor, guided the American economy from a war-time to a peace-time footing, and advanced the cause of African-American civil rights. Historians now rank Truman among the nation's best Presidents.