Scolding regular people for contributing to climate change is out of fashion. But scolding people for making new people is, apparently, totally fine. Many climate activists say the worst thing an individual can do, from an emissions perspective, is have kids. The climate-advocacy group Project Drawdown lists “family planning and education,” which are intended to lower fertility rates, as leading solutions to global warming. Naomi Oreskes, a Harvard historian and celebrated climate researcher, published an op-ed in Scientific American this month titled “Eight Billion People in the World Is a Crisis, Not an Achievement.”

In recent years, many climate advocates have emphasized human population itself—as opposed to related factors such as consumption and technology—as the driving force behind environmental destruction. This is, at bottom, a very old idea that can be traced back to the 18th-century cleric Thomas Malthus. It is also analytically unsound and morally objectionable. Critics of overpopulation down through the ages have had a nasty habit of treating people less as individuals with value and agency than as sentient locusts.

[Both the abortion industry and modern environmentalism — especially regarding climate change — have their roots in eugenics. Their policy outcomes reflect that as well, as Ramachandran aptly notes. The high priests of eugenics are making a comeback these days despite being proven wrong on all of their predictions. It’s evidence that sneering elitism appeals to those who consider themselves elite. — Ed]