"At one level, this movement on behalf of oppressed farm animals is emotional […] Yet the movement is also the product of a deep intellectual ferment pioneered by the Princeton scholar Peter Singer. […] This idea popularized by Professor Singer — that we have ethical obligations that transcend our species — is one whose time appears to have come. […] What we're seeing now is an interesting moral moment: a grass-roots effort by members of one species to promote the welfare of others. […] animal rights are now firmly on the mainstream ethical agenda."