Why is it that Africa has had a 200,000 year advantage and it’s still a poor

Why is it that Africa has had a 200,000 year advantage and it’s still a poor continent even though the USA grow very fast in under 300 years?

For 5 reasons:

Reason # 1: Presentism, the hallmark of parvenu individuals and groups.

• Ancient Egypt was so rich that the First World Wonder, the Great Pyramid of Giza is located in Egypt. How much did it cost to build the pyramid? Not only the pyramid, but the Sphinx and the megatemples of the Valley of the Kings in Upper Egypt.
• The Empire of Mali was richer than medieval Britain.
• The richest man who has ever lived in a Malian ruler, Mansa Musa.
• Until the mid-19th, Africa had military power and wealth that could rival and surpass the great empires of Europe. Africans had their own currencies and indigenous financial management practices based on ethno-finance concepts.
• The empire of Ghana provides a window for us on how rich Africa was. (dogs with pure gold collars and every peasant had a piece of gold). the King of Ghana was described as tethering his horse to a “brick of gold”..
• In Munhumutapa (present day Zimbabwe) the gold miners dug 43 million tons of ore. One scholar has estimated that this would produce pure gold to the value of $7.5 billion in 1998 money.
• The incredible wealth of the Golden Kingdoms of Medieval Africa (Ghana, Mali, Songhay and Monomotapa) was such that they controlled large segments of the Gold Trade. As someone said : On his stop in Cairo, Mansa Musa, the Malian king, spent so much gold to the poor that he caused mass inflation. In the cities of Cairo, Medina, and Mecca, the sudden influx of gold devalued the metal significantly.
• Queen Sheba of Ethiopia, the iconic ruler of Axum, gave King Solomon circa 5 tons of gold (321 million dollars).
• The Swahili coast was littered with advanced city-states who grew wealthy through maritime trade as far as China. Kilwa, the most famous trading city was described as oneof the most beautiful and well-constructed citieis in the medieval world.”

Supposed The US was ganged upon by Great Britain, Portugal, France, Spain, Germany Belgium, Holland, Italy for over 400 years. Or supposed important US Founding Fathers were assassinated and replaced with despots similar to what had occured during The Pan-African Movement especially during the time of The Cold War between The US/NATO and The USSR/Cuba