Stress

We speak about cortisol as if it were a contaminant: the chemical residue of a bad life, the hormone responsible for belly fat, insomnia, anxiety, and the general collapse of modern existence. The language is too simple. Cortisol is not an invader. It is one of the oldest emergency systems in the body, an evolutionary gift that helped an animal survive the moment when survival became uncertain. Somewhere in that inheritance is the plain fact that someone, somewhere, was not eaten by a tiger. …

Agriculture is the oldest technology we never stopped using. Ten thousand years after the first cultivated grain, we still eat bread, still ferment wine, still brew beer — the same three inventions that let hunter-gatherers become villagers, villagers become cities, and cities become empires. It is tempting to call this progress and move on. But a civilization built on a handful of domesticated grasses has also produced, at a scale our ancestors never approached, obesity, chronic inflammation, insulin resistance, metabolic syndrome, and a mental health crisis that abundance was supposed to prevent. Ten millennia is long enough to ask a blunt question: did we learn anything, or did we just get better at building the trap? …