Physician Kevin Patterson noticed something during his work as an internist-intensivist at the Canadian Combat Surgical Hospital in Kandahar, Afghanistan. The Afghan soldiers, police and civilians he treated had very different bodies from those of the Canadians he treated in his home country.
The organs of the Canadians, Americans, and Europeans he treated were encased in fat. Afghan civilians and soldiers had little or no fat or adipose tissue underneath the skin. Patterson has become convinced that the effects of urbanization are making people everywhere in the world both fatter and sicker.
According to NPR:
"[Patterson] explains that the increase in abdominal fat has driven the epidemic of diabetes over the last 40 years in the developed world -- and that he's now seeing similar patterns in undeveloped regions that have adapted Western eating patterns."