Top 15 businessmen who went from rags to riches – See how they made it! (+Photos)

10. Harold Hamm

Harold was the son of cotton sharecroppers and had to work his way from the ground up to make his fortune. He started out pumping gas and repairing cars enabling him to create his own oil company at the age of 22. Despite never going to college, he grew his oil company into an oil empire that is now worth billions.