And yet it's still far too cheap.

>In the past fifty years, as factory farming spread from poultry to beef, dairy, and pork producers, the average cost of a new house increased nearly 1,500 percent; new cars climbed more than 1,400 percent; but the price of milk is up only 350 percent, and eggs and chicken meat haven’t even doubled. Taking inflation into account, animal protein costs less today than at any time in history. (That is, unless one also takes into account the externalized costs — farm subsidies, environmental impact, human disease, and so on — which make the price historically high.)

- from Eating Animals (2009) by Jonathan Safran Foer