Kristoff, Nicholas D. "Humanity Even for Nonhumans." NEW YORK TIMES April 8, 2009.

One of the historical election landmarks last year had nothing to do with race or the presidency. Rather, it had to do with pigs and chickens — and with overarching ideas about the limits of human dominion over other species. I’m referring to the stunning passage in California, by nearly a 2-to-1 majority, of an animal rights ballot initiative that will ban factory farms from keeping calves, pregnant hogs or egg-laying hens in tiny pens or cages in which they can’t stretch out or turn around. It was an element of a broad push in Europe and America alike to grant increasing legal protections to animals. Spain is moving to grant basic legal rights to apes. In the United States, law schools are offering courses on animal rights, fast-food restaurants including Burger King are working with animal rights groups to ease the plight of hogs and chickens in factory farms and the Humane Society of the United States is preparing to push new legislation to extend the California protections to other states. At one level, this movement on behalf of oppressed farm animals is emotional, driven by sympathy at photos of forlorn pigs or veal calves kept in tiny pens. Yet the movement is also the product of a deep intellectual ferment pioneered by the Princeton scholar Peter Singer. . . . Read the rest here: http://www.nytimes.com/2009/04/09/opinion/09kristof.html?_r=3&ref=opinion.