The way we eat has changed more in the last 50 years than in the previous 10,000. That’s according to Michael Pollan, in the new documentary Food, Inc. 
What Upton Sinclair’s The Jungle did for the meat-packing industry, Robert Kenner’s new film aims to do for modern industrial agriculture (though rather than aiming for the heart and hitting the stomach, the film aims for both and scores two solid hits). The quest for bigger, fatter, cheaper food has given us predictability and low prices, but at the cost of our health, our environment, and our collective conscience.
Nicholas Kristof reviews  the film for the New York Times:
Growing up on a farm near Yamhill, Ore., I quickly learned to appreciate the difference between fresh, home-grown foods and the commercial versions in the supermarket.
Store-bought lettuce was always lush, green and pristine, and thus vastly preferable to lettuce from my Mom’s vegetable garden (organic before we called it that). Her lettuce kept me on my toes, because a caterpillar might come crawling out of my salad.
We endured endless elk and venison — my Dad is still hunting at age 90 — or ate beef from steers raised on our own pasture, but “grass-fed” had no allure for me. I longed for delicious, wholesome food that my friends in town ate. Like hot dogs.
Over the years, though, I’ve become nostalgic for an occasional bug in my salad, for an apple that feels as if it were designed by God rather than by a committee. More broadly, it has become clear that the same factors that impelled me toward factory-produced meat and vegetables — cheap, predictable food — also resulted in a profoundly unhealthy American diet.
I’ve often criticized America’s health care system, and I fervently hope that we’re going to see a public insurance option this year. But one reason for our health problems is our industrialized agriculture system, and that should be under scrutiny as well.
A terrific new documentary, “Food, Inc.,”  playing in cinemas nationwide, offers a powerful and largely persuasive diagnosis of American agriculture. Go see it, but be warned that you may not want to eat for a week afterward.
(It was particularly unnerving to see leftover animal bits washed over with ammonia and ground into “hamburger filler.” If you happen to be eating a hamburger as you read this, I apologize.)
“The way we eat has changed more in the last 50 years than in the previous 10,000,” Michael Pollan, the food writer, declares in the film.