Factory farming isn't just killing: It is negation, a complete denial of the animal as a living being with his or her own needs and nature. It is not the worst evil we can do, but it is the worst evil we can do to them.

When you start with a necessary evil, and then over time the necessity passes away, what's left?

Perhaps that is part of the animals' role among us, to awaken humility, to turn our minds back to the mystery of things, and open our hearts to that most impractical of hopes in which all creation speaks as one.

An author describing the methods of intensive farming, or the excesses of sport hunting, or even the harsher uses of animals in science writes with confidence that most readers will share his sense of concern and indignation. Sounding the call to action-convincing people that change is not only necessary, but actually possible-is more problematic. In protecting animals from cruelty, it is always just one step from the mainstream to the fringe. To condemn the wrong is obvious, to suggest its abolition radical.

Go into the largest livestock operation, search out the darkest and tiniest stall or pen, single out the filthiest, most forlorn little lamb or pig or calf, and that is one of God's creatures you're looking at, morally indistinguishable from your beloved Fluffy or Frisky.

Religious people ... hold a kind and merciful view of life, the faith of the broken, the hounded, the hopeless. Yet too often, they will not extend that spirit to our fellow creatures.

Factory farming isn't just killing: It is negation, a complete denial of the animal as a living being with his or her own needs and nature. It is not the worst evil we can do, but it is the worst evil we can do to them.