Nationalism significantly influences politics across countries by shaping identities, policies, and international relations. In many cases, nationalism fosters a collective identity, promoting social cohesion and loyalty to the nation. However, it can also lead to xenophobia and isolationist policies, complicating diplomatic relations. Nationalistic movements can advocate for autonomy or independence in multi-ethnic states, affecting domestic stability. Furthermore, nationalism can dictate foreign policy choices, influencing military engagements and alliances. The balance of nationalism varies widely, impacting political outcomes and national unity.