For Caplan, No. 1 on his list is whether suffering was involved. "So I want happy chickens, no veal, no foie gras. After that comes environmental impact, and then labor. I have an ethical guide in my head that helps me through the store."
He also points out that, in a way, we should be grateful we are even considering all these ethical questions. "These are the dilemmas of abundance," he says. "If we were living in Darfur, the only answer to 'what to eat?' would be 'anything I can find.' "