What else is it that should trace the insuperable line? Is it the faculty of reason or perhaps the faculty of discourse? But a full-grown horse or dog is beyond comparison a more rational, as well as more conversable animal, than an infant of a day or a week or even a month old. But suppose they were otherwise, what would it avail? The question is not, Can they reason?, nor Can they talk? but, Can they suffer? Why should the law refuse its protection to any sensitive being? The time will come when humanity will extend its mantle over everything which breathes.
Jeremy BenthamIt is vain to talk of the interest of the community, without understanding what is the interest of the individual
Jeremy BenthamThe day may come when the rest of the animal creation may acquire those rights which never could have been withholden from them but by the hand of tyranny.
Jeremy Bentham