answer:
industrial revolution & nationalism
Step-by-step explanation:
industrial revolution — due to an increase of production, countries wanted to expand their nations and needed more people to work for them. new technologies and factories started developing, requiring more workers for these new jobs
nationalism — nations started developing pride over their race, culture, etc and they felt that imperializing other countries would make their country more superior than the others. it was a form of pride for their country
- it caused the europeans to feel that it was "white man's burden" to civilize the "uncivilized" natives
- this was almost a way to justify their crimes against them