This post is presented in this week’s series recognizing Earth Day, Friday, April 22.
The age-old specter of “overpopulation,” it seems, is back in vogue among environmentalists once more. “Our population,” writes celebrity biologist E.O. Wilson on the first page of his new book Half-Earth, “is too large for safety and comfort.” Celebrity economist Jeffrey Sachs agrees, arguing in his own new book on sustainable development that “our starting point is our crowded planet.” Meanwhile, in Life on the Brink: Environmentalists Confront Overpopulation, an eclectic collection of writers come together to “reignite a robust discussion of population issues among environmentalists, environmental studies scholars, policymakers, and the general public.” At the same time, the Foundation for Deep Ecology has launched a campaign called Global Population Speak Out, supported by a collection of evocative photographs, to explore “connections between the size and growth of the human population and key sustainability issues.” This focus has been reinforced by recent projections that the global population may reach nearly ten billion by 2050, revising previous assertions of an imminent level-off at nine billion or less. Despite decades of debate and concerted efforts to point out the problems in its framing, “overpopulation,” it seems, is squarely back on the environmental agenda yet again.