 According to some archaeologists, including Dennis Stanford and Joseph and Lynn McAvoy, the Cactus Hill site furnishes evidence of a pre-Clovis population in North America.They consider Cactus Hill significant because it challenges established models of Paleoindian migration.The Clovis first hypothesis which most anthropologists now reject, is the argument that the people associated with the Clovis culture were the first widespread inhabitants of the Americas.