How the social darwinisms and the nationalism cause the world 1 and world war 2?

Social Darwinism promoted the idea of survival of the fittest, leading to competitive and aggressive behavior among nations seeking to assert dominance. This, combined with extreme nationalist ideologies that prioritized one's own country over others, fueled conflicts and rivalries that ultimately contributed to both World War I and World War II. Nationalistic fervor and social Darwinist beliefs justified militarism and Imperialism, which escalated tensions and resulted in devastating global conflicts.