Here's why:
* Nation: Refers to a group of people who share a common culture, language, history, and often a sense of identity and belonging.
* State: Refers to a political entity with defined territory, a government, and the ability to enforce laws and policies.
A nation-state is a country where the boundaries of the state align with the territory inhabited by a nation, creating a strong sense of unity and shared identity.
While not all countries perfectly match this ideal, the concept of the nation-state is a powerful idea that shapes how we understand and categorize countries.