To me, it certainly seems to suggest an environmental cause (or at least significant contributor). Certainly doesn't seem evolutionarily adaptive for such a large proportion of the population to live with profound mental and physical fatigue.
Obesity is an obvious confounder, but these seemingly frequent front-page HN sleep apnea posts usually abound with anecdotes of normal / thin individuals with significant issues.
Obesity is an obvious confounder, but these seemingly frequent front-page HN sleep apnea posts usually abound with anecdotes of normal / thin individuals with significant issues.