He talks about "growing meat" - which point I've not personally dealt with yet - but the arguments about not eating "animals" are very interesting.
Dilemma of A Carnivore
By William Saletan
Sunday, May 28, 2006; Page B02
W here were you when Barbaro broke his leg? I was at a steakhouse, watching the race on a big screen. I saw a horse pulling up, a jockey clutching him, a woman weeping. Thus began a worldwide vigil over the fate of the great horse. Would he be euthanized? Could doctors save him? In the restaurant, people watched and wondered. Then we went back to eating our steaks.
Shrinks call this "cognitive dissonance." You munch a strip of bacon, then pet your dog. You wince at the sight of a crippled horse but continue chewing your burger. Three weeks ago, I took my kids to a sheep and wool festival. They petted lambs; I nibbled a lamb sausage. That's the thing about humans: We're half-evolved beasts. We love animals, but we love meat, too. We don't want to have to choose. And maybe we don't have to. Maybe, thanks to biotechnology, we can now grow meat instead of butchering it.
With all the problems facing humanity -- war, terrorism, poverty, tyranny -- you probably don't worry much about whether it's right or wrong to eat meat. That's understandable. Every society lives with two kinds of moral problems: the ones it's ready to face, and the ones that will become clear or compelling only in retrospect. Animal sacrifice, human sacrifice, slavery, the subjugation of women -- many traditions seem normal and indispensable until we're ready, morally and economically, to move beyond them.
The case for eating meat is like the case for other traditions: It's natural, it's necessary, and there's nothing wrong with it. But sometimes, we're mistaken. We used to think we were the only creatures that could manipulate grammar, make sophisticated plans or recognize names out of context. In the past month, we've discovered the same skills in birds and dolphins. In recent years, we've learned that crows fashion leaves and metal into tools . Pigeons deceive each other. Rats run mazes in their dreams. Dolphins teach their young to use sponges as protection . Chimps can pick locks. Parrots can work with numbers. Dogs can learn words from context. We thought animals weren't smart enough to deserve protection. It turns out we weren't smart enough to realize they do.
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http://www.washingtonpost.com/wp-dyn/content/article/2006/05/26/AR2006052601709.html