First of all, you're presuming that a million years ago, Homo had a problem getting food. To presume that a species as successful as ours had a problem getting food is kind of silly. Don't forget that a million years ago, food was free, or at least as cheap as effort using skills that we evolved with. Everything alive is built to get food, and we are masters at getting food. Adjunct to that is a very active (among animals) storage metabolism that makes good use of lean times, of which every living thing has has mitigation. Lean times are at worst episodic and must be presumed to be seasonal. But a chronic deficit over a million years means only one thing: adapt or die out. Ancient humans adapted to the environments they live in, and the proof is that we are still here.

Second, there is a lot of data to suggest that modern living is more stressful than life even a century ago. Many studies, testing for cortisol (stress hormone) in the blood of rural farmers and city folk pretty clearly show that living conditions, regardless of the people who live them, create stress and in ways that those folks can't detect in how they feel. Testing of workers and retirees, children and adults, farmers and city dwellers, desk-jobbers and emergency-room nurses show wide variation in endocrinology and other tests for stress.



How would they pay for the food?