How did social darwinism and new national alliances make europe a hostile place at the end of the 1800s and early 1900s

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how did social Darwinism and new national alliances make europe a hostile place at the end of the 1800s and early 1900s

First, Social Darwinism is an  rather than a theory. It is a  of Darwin's theories related to natural selection. It was used to justify imperialism and eugenics (including genocide), among other things. It was also used to justify harsh treatment of people during the industrial revolution.

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islam spread slowly through much of africa through trade and preaching.

i am pretty sure it is a