 Rangeland management was developed in the United States in response to rangeland deterioration and in some cases, denudation, due to overgrazing and other misuse of arid lands, as was described by Hardin’s 1968 "Tragedy of the Commons" and evidenced previously by the 20th century "Dust Bowl".Historically, the discipline focused on the manipulation of grazing and the proper use of rangeland vegetation for livestock.Today, range management's focus has been expanded to include the host of ecosystem services that rangelands provide to humans world-wide.