Sooner or later, obesity will catch up and they can't go to war anymore.
And thus world peace was achieved!
Greed has many ways to corrupt the mind (〜 ̄△ ̄)〜
For the richer folks, maybe. But unless suddenly there's cars, machinery, and automation, I bet the common people will still remain thin through manual labor. Also, no high fructose corn syrup.
Sooner or later, obesity will catch up and they can't go to war anymore.