In the early twenty-first century, best-selling writers Hampton Sides and David Roberts have reappraised the Carson reputation in their works, have explained the complex image of Kit Carson. While a heroic image or reputation of Carson is expressed in the earlier, 1968, biography by Harvey Carter, the older narrative has been revised by both Sides and Roberts: In 1968, Carter stated: “In respect to his actual exploits and his actual character, however, Carson was not overrated. If history has to single out one person from among the Mountain Men to receive the admiration of later generations, Carson is the best choice. He had far more of the good qualities and fewer of the bad qualities than anyone else in that varied lot of individuals.”; In 2000, David Roberts wrote, "Carson's trajectory, over three and a half decades, from thoughtless killer of Apaches and Blackfeet to defender and champion of the Utes, marks him out as one of the few frontiersmen whose change of heart toward the Indians, born not of missionary theory but of first hand experience, can serve as an exemplar for the more enlightened policies that sporadically gained the day in the twentieth century."; In 2006, Hampton Sides said that Carson believed the Native Americans needed reservations as a way of physically separating and shielding them from white hostility and white culture. He is said to have viewed the raids on white settlements as driven by desperation, "committed from absolute necessity when in a starving condition." Indian hunting grounds were disappearing as waves of white settlers filled the region.