Answer:
Climate change, Availability of resources
Explanation:
1. Soon enough when the climate on the planet started to become more arid and become too hot, so humans started to migrate from Africa.
2. People started to move away to the places where resources were available.
The Iron Curtain !
now i just have to reach the word requirement
Heya!! W.E.B Du Bois and Booker T. Washington both had a goal to uplift black community and the both apposed racial violence.