What does that have to do with eating more sugar which seems to have a direct causal effect on becoming fatter and getting diabetes? Lots of countries over mill

What does that have to do with eating more sugar which seems to have a direct causal effect on becoming fatter and getting diabetes? Lots of countries over millennia have worked hard and have been stressed, often much more than us today, yet they were by and large not obese (no pun intended), the only thing that changed in the last century was the rise of processed foods with high amounts of sugar.