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The myth of superabundance is the belief that earth has more than sufficient natural resources to satisfy humanity's needs, and that no matter how much of these resources humanity uses, the planet will continuously replenish the supply. Although the idea had existed previously among conservationists in the 19th century, it was not given a name until Stewart Udall's 1964 book The Quiet Crisis.

Udall describes the myth as the belief that there was "so much land, so much water, so much timber, so many birds and beasts" that man did not envision a time where the planet would not replenish what had been sowed. The myth of superabundance began to circulate during Thomas Jefferson's presidency at the beginning of the nineteenth century and persuaded many Americans to exploit natural resources as they pleased with no thought of long-term consequences. According to historian of the North American west George Colpitts, "No theme became as integral to western promotion as natural abundance." Especially with respect to the west after 1890, promotional literature encouraged migration by invoking the idea that God had provided an abundant environment there such that no man or family would fail if they sought to farm or otherwise live off the land out west. Since at that time environmental science and the study of ecology barely allowed for the possibility of animal extinction and did not provide tools for measuring biomass or the limits of natural resources, many speculators, settlers, and other parties participated in unsustainable practices that led to various extinctions, the Dust Bowl phenomenon, and other environmental catastrophes.

Early manifestations