10. The End of the Cold War (1991)
The dissolution of the Soviet Union in 1991 marked a turning point in global history. With its chief rival gone, the United States emerged as the world’s sole superpower, ending decades of bipolar rivalry and ushering in a new unipolar world order.
This unprecedented status allowed the U.S. to shape international policy, economics, and security with little opposition. The end of the Cold War redefined America’s global role and set the stage for its continued dominance into the 21st century.
