40 years ago the majority of the population of the US or North Europe was thin. This has been so for the entire evolution of the human species.
People 40 years ago did not starve. They just ate things that refrigerators and mass industrial production do not preserve well, like vitamins, or fiber, or natural fat(like butter).
Now, when most people eat mass-processed foods, odd things happen, and unless people change their food habits, nothing is going to change, but that is not "impossible".
40 years ago the majority of the population of the US or North Europe was thin. This has been so for the entire evolution of the human species.
People 40 years ago did not starve. They just ate things that refrigerators and mass industrial production do not preserve well, like vitamins, or fiber, or natural fat(like butter).
Now, when most people eat mass-processed foods, odd things happen, and unless people change their food habits, nothing is going to change, but that is not "impossible".