[gtt]

>>Simple logic would suggest that our food is the main culprit.

Then, why does it happen in wild animals? They are not eating processed foods.

Even if the food is main culprit, it leads to the question of what is exactly wrong with the food?

p.s. we have enough data to understand overall historical trends and authors cite it:

https://voxeu.org/article/100-years-us-obesity

[mickaelP38]

> Primates and rodents living in research colonies, feral rodents living in our cities, and domestic pets like dogs and cats are all steadily getting fatter and fatter.

All are fed with human produced food. Also as someone noted our food (raw food) is decreasingly nutritious when it comes to micronutrients and vitamins.