The Incas in South America began cultivating peanuts around 950 B.C. They invented peanut butter as soon as they could.
Peanuts travelled to Africa with early explorers and then went to Spain after the Conquistadores got tired of pillaging. The Spaniards traded the peanuts to the Virginia colonies. By this time, no one had ever heard of peanut butter.
George Washington Carver finally reinvented peanut butter in 1880. He was craving a peanut butter, banana and mayo sandwich.