There is a genetic predisposition to diabetes, but that can be easily controlled with the proper diet and exercise, something people did in the past because they knew they had to if they wanted to live.  A lot of diabetics ended up dying before they were able to reproduce if they didn't get their shit together.  Then insulin was discovered and made available to the public, and they stopped trying to keep up with a healthy lifestyle and turned into the bloated beasts we're dealing with now.  Combined with the fact that medicine is keeping them alive and allowing them to breed and spread their bad genes and life choices, we're now dealing with the epidemic of fat fucks you see today. Insulin should only be available to type 1 diabetics.  They're not to blame for their pancreases going out.  The type 2s did it to themselves and should be allowed to suffer the consequences of their actions.