How did world war 2 the cold war and civil war unrest shape the American century?

World War II established the United States as a global superpower, fostering economic prosperity and technological advancements while promoting democratic ideals. The subsequent Cold War intensified ideological conflicts, leading to military engagements and an arms race that shaped U.S. foreign policy and domestic politics. Additionally, civil unrest during this period, driven by the Civil Rights Movement and anti-war sentiments, challenged social norms and prompted significant legislative changes. Together, these events defined the American Century by emphasizing the U.S.'s role in promoting democracy and confronting authoritarianism, while also grappling with internal social challenges.