What purpose did the evolution of the nation-state serve?

The evolution of the nation-state primarily served to ensure recognition of sovereignty. This concept emerged from the need for political entities to establish clear boundaries and govern themselves without external interference. As nations developed, they sought to assert their authority and legitimacy both internally and on the international stage, leading to a system where states could operate independently and maintain control over their territory and population.

Sovereignty is critical because it allows a nation to define its laws, policies, and governance structures, fostering a stable environment for citizens. In contrast to alternatives like empires or colonies where authority could be contested or shared, the nation-state provided a clear framework for political authority tied to a defined geographic area and people who share a common identity. This framework thus became foundational for international relations, influencing diplomacy and the formation of treaties.

In establishing nation-states, societies aimed to build cohesion among diverse populations and establish order within and between nations, significantly shaping political, social, and economic interactions in the modern world.