What was the role of midwestern cities in the meat packaging industry

the right answer is the end of world war ii

after the end of a global wwii all the nations involved, in an attempt to create an organization to maintain world peace. this agreement would work settling international disputes via negotiation and arbitration instead of leading the issues escalate to another war.

answer:

it caused mass african migration, african populations to grow, african empires to topple, and racism against slaves to emerge.