Caveman Effect

The brain you carry today was built for the savanna: small bands, visible food, immediate dangers, face-to-face reputation. You are running that hardware in a world of cities, screens, statistics, and strangers. The mismatch explains most of this book.

See it working. We crave sugar and salt because they were rare; now they are engineered into everything. We fear the stranger and trust the face because danger was nearby and personal; now the risks are invisible and statistical. We obsess over standing in the band of fifty; now the band is a network of billions.

The effect is not a defect to despise — the old hardware is magnificent at what it was built for. It is a map to consult. When your instincts and your interests diverge, the caveman is usually why.

So translate for him. The instinct says eat the whole jar; the world now has infinite jars. The instinct says fear the unfamiliar; the world's opportunities are all unfamiliar. You cannot evict the caveman — he is the building's foundation. But you can stop letting him do the shopping.