Nationalism can both solve and create problems, depending on how it is expressed and practiced. On the one hand, nationalism can be a unifying force that promotes a sense of shared identity, common values, and collective purpose among a group of people. This can help to strengthen social cohesion, increase political stability, and promote economic development.
On the other hand, nationalism can also create problems when it is expressed in a divisive or exclusionary way. This can lead to conflicts between different groups of people based on their ethnic, religious, or cultural backgrounds, and can fuel intolerance, discrimination, and even violence. Additionally, extreme forms of nationalism can lead to aggressive foreign policies, territorial disputes, and even wars.
In conclusion, nationalism can have both positive and negative effects, depending on how it is expressed and practiced.