What is one reason why nationalism can lead to conflict?

Nationalism can lead to conflict primarily because it can create divisions between different national groups. As people become more focused on their own national identity, they may develop a strong sense of competition or animosity toward other nations or ethnic groups that they see as different or threatening to their own cultural heritage. This intense loyalty to one's own nation can result in the desire to assert dominance, protect territorial claims, or react defensively to perceived insults or challenges. Consequently, these feelings can escalate into conflicts, such as wars or ethnic tensions, especially when competing nationalisms confront each other.

Promoting global cooperation, encouraging shared cultural heritage, and enhancing international trade are aspects that are generally associated with fostering peace and collaboration among nations, rather than conflict. However, the inward focus of nationalism often prioritizes one's own nation to the detriment of others, which directly contributes to strife.