The "Post-Cold War" era began after the collapse of the Soviet Union in 1991, marking the end of the Cold War between the United States and Soviet Union. This period is characterized by the spread of democracy and capitalism in many former communist countries, as well as a shift in global power dynamics. During this time, new challenges emerged, including regional conflicts, terrorism, and economic globalization. International organizations like the United Nations played a more prominent role in addressing these issues, while the United States became the world's sole superpower, influencing global politics and economics significantly.