Pedro awoke suddenly in the middle of the night, his eyes on fire. Out of nowhere—sharp, blazing pain. He sat up, rubbed his face, kept trying to unglue his eyes. He reached for his dad or his brother, fumbling frantically in the darkness of the damp tent. "Daddy! Juan! Daddy!"

Juan is Pedro's twin. They are exact replicas: slim, brown, shy, equally oblivious to the powers of their teen-idol good looks—the kind of twins who can survive by bamboozling people, taking tests and talking to girls for each other. Juan felt Pedro's panic as if it was his own. He grabbed a flashlight. "Daddy!" he hollered, waking his father, who reached into the light and pried open one of Pedro's eyes. It was yellow, the eyeball hidden beneath a thick curtain of pus."I can't see!" Pedro screamed. "Daddy, I can't see."

There are systems in place, of course—family doctors, pharmacies, and twenty-four-hour urgent-care centers. But a lot of those amenities are not immediately within reach if you're a migrant worker living out of your car, sleeping beside a field of blueberries. Perhaps you should have made preparations for your kid waking up blind, but you didn't. You just didn't. Urbano, a compact, worn-out version of his sons, sat in the tent wondering what to do. It was nearly 4 A.M., and Consuelo, on the other side of camp, would be up soon to start the biscuits and the soup. Urbano told the boys to stay in the tent, to be quiet and wait. They shouldn't disturb anyone. That was how he taught them. Keep a low profile. Don't ever make a scene. Not even if someone robs your tent; just hide your money better next time. If the family in the cabin next door is drunk and fighting and you can't sleep, put earplugs in. If the rain soaks your bedroll, get up and sleep in the car.

Surely someone in Consuelo's huge clan—thirteen people crammed into two cabins—would know what to do for Pedro. So Urbano hushed his son, wrapped his arms around him, and rocked him, even though at 14, Pedro was way too old for something like that. "Shshshsh," Urbano said, swaying back and forth, his mind soon rolling with the thoughts that can rattle like loose cargo in the back of his head. He was a man who had awakened to a thousand mornings of bad news, but these, he knew, had only made him stronger. He had acquired wisdom. He understood how the world was divided: kings over here, peasants over there. Kings live in palaces and want berries on their cornflakes; peasants need the money so they work the fields. And you? You were born king or you were born peasant, and that got decided long before you fell out of your mama's womb, so don't bother worrying about it. Say your prayers, be thankful for what you've got, and hang a crucifix from your rearview mirror so Jesus will protect your family from the chupacabras and other spirits lurking in the woods.

Wash the apple before you bite into it, because that's the way you were raised. Germs, pesticides, dirt, gunk, it doesn't matter—just wash it. The fingerprints, too, go down the drain with the rest. It's easy to forget that there are people who harvest our food. Sometimes, maybe, we are reminded of the seasons and the sun and the way of the apple tree, and if we multiply that by millions of apple trees, times millions of tomato plants, times all the other fruits and vegetables, we realize, holy potato chips, that's a lot of picking. Without 1 million people on the ground, on ladders, in bushes—armies of pickers swooping in like bees—all the tilling, planting, and fertilizing of America's $144 billion horticultural production is for naught. The fruit falls to the ground and rots.