National sovereignty holds significant importance in international relations as it embodies a nation's right to self-governance, free from external interference. This principle underpins the interactions between states and is central to issues like territorial integrity and diplomatic recognition. While sovereignty allows nations to establish their laws and policies, it can also complicate global governance efforts, particularly in addressing transnational challenges like climate change and human rights violations. Balancing national sovereignty with international cooperation is critical for promoting peace and stability in a complex global landscape.