Africa has diverse geography including plateaus, mountains, deserts, grasslands, and jungles. It is the second largest continent, nearly 4 times the size of the United States. Ancient civilizations like Egypt, Carthage, and various kingdoms in Northeast Africa established some of the earliest civilizations on the continent. Major West African empires like Ghana, Mali, and Songhai flourished due to gold and trade along the Niger River. East African city-states engaged in trade with Arabs and Persians. Forest kingdoms provided goods to the city-states and the Kingdom of Benin had great artistic accomplishments. African culture was based around family, clan, and tribe with diverse religious beliefs and reliance on farming