National sovereignty refers to the authority of a state to govern itself without external interference. This means that a country, like France or Brazil, has the right to make its own laws, control its own resources, and manage its own affairs. It is a fundamental principle in international relations, ensuring that nations can operate independently and protect their interests. However, national sovereignty can sometimes conflict with global issues, such as climate change or human rights. For instance, when a government prioritizes its sovereignty, it may resist international agreements that aim to address these challenges. Balancing national interests with global responsibilities is a complex task for many countries.