What does Theseus mean by ""I will wed thee in another key""?

The phrase "I will wed thee in another key" means that Theseus will marry Hippolyta in a special way. In this case he wants marry her with splendid ceremonies, public festivities, and celebration.

the african society basically suffered the consequences of colonization and apartheid directly attacking the black people, first, during the colonialism and its main idea which which "white people" had better rights, affecting   them principally in the right to establish black people in their territories, access to quality education and health services and took away any civil right even to the black people to feel they have the same opportunities as the settlers.