The World Wars changed the map and how countries relate to each other. New powerful nations arose, old empires crumbled, and global organizations were set up to prevent more wars.
The World Wars really shook things up in terms of how countries deal with each other. After World War I, borders in Europe got shuffled around a lot, and some new countries were created. Then, World War II came along and made things even more complicated. It split Europe into two big groups, the East and the West, during the Cold War. All of this changed how countries interact with each other and set up how the world works today.