Breakfast hasn't always been the most important meal of the day.
Breakfast is the most important meal of the day—an aphorism first uttered by, of all people, Franz Kafka—but our ancestors were slow to get the wake-up call. Our Neolithic kin ground grains for a sort of porridge, and Roman soldiers started the day with another porridge called pulmentus. But for much of recorded history, only children and the weak ate three square meals a day. Adults were expected to get by on a midday dinner and a light supper.