> Just saying "cheeseburgers" or "calories in, calories out" fails to explain why people eat more calories now than they did before.
Junk foods at high-availability, low cost, offering low-to-zero satiety per-calorie, and habit-forming addictive potential. The answer is pretty much in your sentence. Add to the fact, eating well on a budget requires you to prepare food at home. Lots of pressures funnel people to obesity. In the before-times (if you want to set your clock well before the obesity epidemic), two-income households weren't a thing for the most part and manufactured junk foods were a novelty on the market. People kept more active even at leisure, with tv being the novel and singular screen-based entertainment device that not everyone could afford at outset.
Sure, I think that's a very plausible explanation. It also points to specific, testable policy changes. For example, a government could build a low cost (subsidized), healthy competitor to fast food. Alternatively, a government could implement a comprehensive "sin tax" scheme on "low quality" calories coupled with expanded food stamps (to ensure the poorest people can afford healthy alternatives). Governments could even go into food desserts and open health-focused grocery stores. We could see if low cost/low quality calories are the issue via a legislative experiment.
I've often thought that government-run "soup kitchens" providing basic nutritional food in small portions should be everywhere - no requirements to eat there, if Bill Gates and Buffet want to have lunch at the free soup kitchen who cares.
I like the Japanese school-lunch system. Kids develop a familiarity with real food, which stays with them into adulthood (and reduces the likelihood of obesity ever occurring), and parents don't have to worry about it.
Junk foods at high-availability, low cost, offering low-to-zero satiety per-calorie, and habit-forming addictive potential. The answer is pretty much in your sentence. Add to the fact, eating well on a budget requires you to prepare food at home. Lots of pressures funnel people to obesity. In the before-times (if you want to set your clock well before the obesity epidemic), two-income households weren't a thing for the most part and manufactured junk foods were a novelty on the market. People kept more active even at leisure, with tv being the novel and singular screen-based entertainment device that not everyone could afford at outset.