We all know — because we are being constantly reminded — that we are, collectively, getting fat. Americans are at the forefront of the trend, but it is a transnational one. Apparently, it is also transspecies: pets, wild animals, and laboratory animals are also gaining weight. Here’s some country-level data from the New York Times:
In an excellent review of the existing literature, David Berreby at Aeon skewers the idea that a simple, victim-blaming “calories in, calories out” model can explain this extraordinary transnational, transspecies rise in overweight and obese individuals. I won’t summarize his argument here, except to simply list the casual contenders for which there is good evidence:
- Industrial chemicals
- Heavy metals
- Electric lights
- Air conditioning
- Famine in previous generations
If you ever want to have an opinion on fat again, read Berreby now.
Lisa Wade, PhD is an Associate Professor at Tulane University. She is the author of American Hookup, a book about college sexual culture; a textbook about gender; and a forthcoming introductory text: Terrible Magnificent Sociology. You can follow her on Twitter and Instagram.