The most famous proponent, philosopher Tom Regan, argued that animals are "subjects-of-a-life" who possess inherent value. Therefore, using a sentient animal as a resource (food, coat, or test subject) is exploitation, akin to slavery or human trafficking.
One wants to regulate the size of the cage; the other wants to unlock the door. Both, however, begin with the same act of humility: setting aside human exceptionalism long enough to look at a pig, a chicken, or a chimp, and recognizing that their suffering is as real as our own. The most famous proponent, philosopher Tom Regan, argued
You do not have to give up your leather shoes tomorrow or empty your refrigerator tonight. But you are now aware of the argument. And once you hear the question— Can they suffer? —the silence that follows demands an answer. Both, however, begin with the same act of