Answer:
By extending their arguments to address entire nations, some social Darwinists justified imperialism on the basis that the imperial powers were naturally superior and their control over other nations was in the best interest of human evolution.
Ethnocentric: Imperial nations sometimes believed that their cultural values or beliefs were superior to other nations or groups. Imperial conquest, they believed, would bring successful culture to inferior people. Empires sought strategic territory to ensure access for their navies and armies around the world.
Step-by-step explanation: