Animal factories are one more sign of the extent to which our technological capacities have advanced faster than our ethics.

As for cages themselves, an ordinary citizen who kept dogs in similar conditions for their entire lives would risk prosecution for cruelty. A pig producer who keeps an animal of comparable intelligence in this manner, however, is more likely to be rewarded with a tax concession or, in some countries, a direct government subsidy.

Sci-fi is often a metaphor. I think it's more the themes and questions that science fiction raises rather than the exact predictions that should guide us.

If we are concerned about the exploitation of human workers in countries with low standards of worker protection, we should also be concerned about the treatment of even more defenceless non-human animals.

All the arguments to prove man's superiority cannot shatter this hard fact: in suffering, the animals are our equals.

If penicillin had been judged by its toxicity to guinea pigs, it might never have been used by man.

I don't think nationalism is alone holding the field; it's in contention with a lot of different things.