Nationalism is a complex ideology that can be defined in a variety of ways. However, all definitions of nationalism share the common belief that one's nation is unique and special, and that it should be protected and promoted.

Nationalism can have a number of positive effects, including creating a sense of unity and belonging, motivating people to work together for the common good, and helping to preserve a nation's culture and traditions.

Nationalism can also have a number of negative effects, including leading to discrimination and violence against other groups, making it difficult to resolve conflicts between different nations, and leading to war.

It is impossible to say how nationalism will affect the future. It is a complex ideology with both positive and negative potential effects. The future of nationalism will depend on a variety of factors, including the actions of individual nations and the global community.

There are a number of things that can be done to mitigate the negative effects of nationalism. These include promoting education and understanding about other cultures, encouraging cooperation and dialogue between different nations, and creating international organizations to help resolve conflicts peacefully.