Answer :
I think nationalism because people were concerned with their importance in the world. They wanted to feel their land and culture were better and more sophisticated than others so they would seek out other areas to validate their feelings.
Answer:
nationalism
Explanation:
Nationalism is an ideology and sociopolitical movement that emerged along with the modern concept of nation, typical of the Contemporary Age, in the historical circumstances of the so-called era of Revolutions (industrial revolution, bourgeois revolution, liberal revolution) and independence movements of the European colonies in America, since the late eighteenth century. It can also designate nationalist sentiment and the era of nationalism.