Question

in what ways did the aggressive nationalism lead to world wars​

Answer 1

A first charge is that the ideology of nationalism is itself a cause of war. Nationalism is a secular ‘religion’ that proclaims that the world is composed of unique and ancient nations which have exclusive homelands, and that the’ sacred duty of individuals is to defend the territory, independence, and identity of their nation. But critics say that nationalism is historical fantasy: such nations have not existed before the modern world, human populations more often than not have been intermingled, and attempts to separate them into exclusive territories generates conflict. Moreover, nationalists also deny all existing agreements, including treaties between states, that are not based on the free will of peoples. Nationalism thus necessarily leads to war.

Answer 2

Explanation:

The time of1900

jealousy grows in people's mind

so they were angry and started war .