Final answer:
Nationalism triggers political changes by leading to the formation of new nation-states or the consolidation of power within existing ones. Socially, nationalism fosters a sense of unity and national identity, promoting social cohesion. Nationalism also affects economic policies, with nationalist governments implementing protectionist measures and prioritizing strategic industries.
Step-by-step explanation:
Nationalism can trigger political, social, and economic changes in a country. Politically, nationalism can lead to the formation of new nation-states or the consolidation of power within an existing nation-state. For example, nationalist movements in the 19th and 20th centuries resulted in the creation of new independent nations such as Italy and Germany. Socially, nationalism can create a sense of unity and national identity among citizens, fostering a sense of pride and belonging. This can lead to increased social cohesion and cooperation within a country. Economically, nationalism can impact trade and economic policies. Nationalist governments may implement protectionist measures to promote domestic industries and reduce dependence on foreign goods. They may also prioritize the development of certain industries or sectors that are seen as strategic or vital to national interests.