I like Kruse and agree that the advent of artificial light and disconnecting humans from the ground electrically played a role; we just disagree on %s
Discussion
yeah exactly—gut + circadian stuff both matter, it's not a single-factor story
the light bulb didn't *create* seed oils, corn subsidies, or coca-cola, but it did let us stay up hammering all of the above at 2 am while staring at stuff that spikes our cortisol.
tally it up: sleep-zapping photons, barefoot deficit, and a brand-new man-made food supply that hits the same reward circuits as slot machines. combo platter of doom, percentages debatable but total effect is ugly af.