Final answer:
Nationalism is the loyalty and devotion to one's country, promoting its culture and interests above others. It can lead to unity but also generate hostility and marginalize minority communities.
Step-by-step explanation:
Nationalism is the loyalty and devotion to one's country, particularly in terms of national consciousness and promoting its culture and interests above those of other nations or supranational groups. It is the belief that one's country is superior and should be prioritized. Nationalism can lead to unity, but it can also generate hostility towards outsiders and marginalize minority communities.