>going from the stages in order of: (1) scavenging food, (2) to cooking our food, (3) to having plentiful sources of cooked food--made us stronger, smarter, nourished, and prettier.
Going by that logic, would obesity be the next stage in the human evolutionary process?
no, the next stage is global adoption of soylent
No. Eating extra food instead of storing it for the future is a sign of stupidity