How did colonization effect the world’s population patterns?

Increase in population on the western hemisphere

Explanation:

4 copper and gold, the california gold rush is why im pretty sure.

the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).