Several publications are now reporting that the richest man of all time was Mansa Musa I. The King of the African nation of Mali.
His is said to have been worth 400 billion dollars. He got that rich by controling his countries’ salt and gold.
Salt was the most valuable item in the world at that time. They had no refridgeration, and salt was the only thing that would help keep fish and meat from spoiling.
He was unable to pass his wealth on to his children because of attacks by other kingdoms.