How did the geography of the world change during the period of alexnder's rule?

During the time alexander the great was fighting he spread his Greek culture through out the area he was visiting. Which caused non Greek areas to have some Greek culture

also I think you ment Alexander not Alexnder

b]to spread the message of black power

answer:

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