Umberto Eco (1999):
But what I really want to talk about is beans, and not just beans but also peas and lentils. All these fruits of the earth are rich in vegetable proteins, as anyone who goes on a low-meat diet knows, for the nutritionist will be sure to insist that a nice dish of lentils or split peas has the nutritional value of a thick, juicy steak. Now the poor, in those remote Middle Ages, did not eat meat, unless they managed to raise a few chickens or engaged in poaching (the game of the forest was the property of the lords). And as I mentioned earlier, this poor diet begat a population that was ill nourished, thin, sickly, short and incapable of tending the fields. So when, in the 10th century, the cultivation of legumes began to spread, it had a profound effect on Europe. Working people were able to eat more protein; as a result, they became more robust, lived longer, created more children and repopulated a continent.
We believe that the inventions and the discoveries that have changed our lives depend on complex machines. But the fact is, we are still here — I mean we Europeans, but also those descendants of the Pilgrim Fathers and the Spanish conquistadors – because of beans. Without beans, the European population would not have doubled within a few centuries, today we would not number in the hundreds of millions and some of us, including even readers of this article, would not exist.