The Happiest Baby on the Block

Mon, 02 Jun 2025 00:00:00 +0000

Your newborn isn’t broken — she’s three months early. Human babies are born far more helpless than almost any other mammal, and Harvey Karp’s explanation is our own big brains. Carry a pregnancy any longer and the baby’s head wouldn’t fit through the birth canal, so we deliver early and finish the job outside. Karp calls the first months after birth the missing fourth trimester: a stretch when your baby is physiologically unfinished and homesick for the womb she just left. That reframe changes everything, because it means most colic isn’t an illness. It’s a baby craving the steady warmth, nourishment, and constant motion of the place she came from.

Harvey Karp on SummaryShelf

The Happiest Baby on the Block