Share-cropping became common in the United States after the Civil War. Back then, many Southern plantations had ample land, but little money to pay wages. At the same time, a large segment of the population was left impoverished, with little prospect of earning an adequate living. So, it was little surprise that the landed people -- those with the means of producing a product -- contracted with the poor, who had labor to offer, to produce a product from which both might profit. Share croppers normally received a home, the necessary tools, farm animals, and sometimes even some education, for...