How was the influence of the nationalists in the European monarchy?

Nationalists in the European monarchies influenced the political landscape by promoting the idea of self-determination and national identity, which often challenged the legitimacy of existing monarchies. They fostered a sense of unity among people sharing common ethnic or cultural backgrounds, leading to demands for independence or autonomy. This rise of nationalism contributed to the decline of empires and the reconfiguration of borders, particularly evident in the 19th and early 20th centuries, culminating in events like the unification of Italy and Germany. Ultimately, nationalism played a crucial role in reshaping Europe, leading to both new nation-states and significant conflict.