Why a well-fed disease-free animal can still be miserable

It's easy to assume that if a creature survives and reproduces, it must be doing fine. No complaints, no problem. Yuval Noah Harari uses this exact assumption to unravel something uncomfortable about how modern farming actually works.

His argument starts with evolution itself. Every instinct, drive and emotion an animal has evolved because it once served survival and reproduction. But when the conditions that created those pressures suddenly change, as they did overnight with the arrival of farming roughly twelve thousand years ago, the instincts don't disappear along with the pressure that shaped them. A wild sow needed to roam, explore, and bond closely with other sows and her piglets in order to survive; those needs are still wired into her descendants even when a human farmer now guarantees her food, shelter and medicine. Harari describes sows confined to gestation crates barely wider than their own bodies, unable even to turn around, nursing piglets who are weaned within weeks instead of the ten to twenty weeks nature intended, then reimpregnated and returned to the crate. The sow survives. She reproduces. By the narrow logic of natural selection, nothing has gone wrong. Subjectively, Harari argues, she is likely suffering acutely.

A strikingly similar mistake, Harari notes, was made about human children not long ago. In the early twentieth century, leading childcare authority John Watson advised parents never to hug or kiss their children, warning that affection would produce needy, insecure adults; a 1929 article in the magazine Infant Care told parents not to hold a crying infant before the scheduled feeding time, insisting it wouldn't hurt the baby to cry. It took the psychologist Harry Harlow's experiments on infant monkeys to correct the record. Given a choice between a wire dummy mother that dispensed milk and a soft cloth dummy with no milk at all, the baby monkeys clung desperately to the cloth mother. Food alone wasn't enough. The need for comfort was as real, and as unmet, as hunger would have been.

The same mismatch, Harari suggests, explains why modern humans crave sugar far more than is good for us, once rare and valuable, now cheap and everywhere, or why young men take risks that made evolutionary sense in a world without seatbelts. Survival was never the same thing as wellbeing, for pigs, for children, or for us.

Pick one relationship you're responsible for, a pet, a child, a colleague, even your own daily routine, and check it against two separate lists, whether the material needs are being met and, just as seriously, whether the older emotional needs, connection, autonomy, physical comfort, are being met too, because Harari's whole point is that meeting only the first list can still leave real suffering underneath. When you feel a craving that seems disproportionate to the situation, a pull toward sugar, risk, or status, pause and ask whether it's solving a problem from a very different, scarcer past rather than the one you're actually living in now. And if you make decisions about animals in your care, weigh what scientists have documented about their emotional and social needs alongside their basic survival, because the two turn out to be genuinely different things.