Question

How did the idea of nation state and nationalism emerged?

Answer 1

nation-state was one in which the majority of itscitizens, and not only its rulers, came to develop a sense of commonidentity and shared history or descent.
☺️hope it helps☺️

Answer 2

Answer :-

Nationalism and the idea of the nation-state emerged within the culturally and regionally diverse groups of Europe. Due to industrialization and transformation of society there emerged a middle class consisting of businessmen, working professionals, industrialists, labourers and working class people.