Here's Alex Tabarrok at Marginal Revolution:
"Animal rights will be the big social revolution of the 21st century. Most people have a vague feeling that factory farms aren’t quite ethical."I want to point out the blindness--the "most people". With my background I don't really buy the argument, or maybe it's better to say the issue is more complex for me than the average brown bear. Anyhow, when I read it, I resisted the concept a bit. But when you think about it--who are the people who Prof. Tabarrok has in his head? They're likely people like him, members of the urban elite. I venture to say that most members of American society don't think about the ethics of factory farming at all. And I venture to say that most people in foreign countries have no opinion on the issue.
My point is it's easy to slip into a generalization which isn't true, particularly when it's a binary issue: is factory farming ethical or not? IMHO it's more accurate to talk about gradations and percentages: a majority of the urban elite (especially native white elites) who have an opinion would likely have questions about the ethics of factory farming.
That's the door of No. 10 Downing Street, according to this