From the colonial era to the present, the ever-shifting debate about Americas prodigious population growth has exerted a profound influence on the evolution of politics, public policy, and economic thinking in the United States. In a remarkable shift since the late 1960s, Americans of all political stripes have come to celebrate the economic virtues of population growth. As one of the only wealthy countries experiencing significant population growth in the twenty-first century, the United States now finds itself at a demographic crossroads, but policymakers seem unwilling or unable to address the myriad economic and environmental questions surrounding this growth.