How did the ming dynasty change chinese society? it relied on the great wall for defense. it discouraged artistic innovation. it limited trade with europeans. it appointed officials based on family ties.

worldwide, 780 million people do not have access to an improved water source. an estimated 2.5 billion people lack access to improved sanitation (more than 35% of the world's population)

answer:

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