well, africans are nto stupid, as your eurocentric textbook may point out.
Every textbook account of the European exploration of the Americas begins with Prince Henry the Navigator, of Portugal ... The textbook authors seem unaware that ancient Phoenicians and Egyptians sailed at least as far as Ireland and England, reached Madeira and the Azores, traded with the aboriginal inhabitants of the Canary Islands, and sailed all the way around Africa before 600 B.C. ... Omitting the accomplishments of the Afro-Phoenicians is ironic, because it was Prince Henry's knowledge of their feats that inspired him to replicate them!
secondly, several scientists have made the voyage from africa to the americans in ships that would have been available at the time.Starting in 1952, Dr. Alain Bombard sailed from Casablanca to Barbados in an African raft. In 1955, Dr. Hannes Lindemann sailed for fifty-two days from the Cape Verde Islands to the South American coast. Both journeys were made alone and the men arrived in good health. In 1969, Thor Heyerdahl conducted two experiments, one with the Ra I and the other with the Ra II. The Ra I and the Ra II were ships built identical to an earlier model African ship. The ships were built out of papyrus and were constructed the way they would have been during the Pre-Columbian era. The Ra I was built by the Buduma people first. The Ra I started at Safi in North Africa and sailed to Barbados. The Ra I fell short of making the journey across the Atlantic. The Ra II was built by a native American tribe, the Aymara, this ship made it from Africa to America successfully. These experiments prove that if these simple vessels could negotiate the Atlantic Ocean using one of the two currents, then some of Africa's more sophisticated ships could have made the trip.
I would also like to point out that african precense in the americas is well documented, columbus' journals themselves mention africans, as do his sons. then there are the taino making spears out of african metal, the olmec carving "amazingly negroid" statues, this goes on and on
I believe that the africans were indeed here beofre columbus!
I also see that the proof is not as concrete as other explorers, and I can see why some might not be convinced. this I can understand.
but I think to discount the theory entirley is mere ignorance