Vegetarianism - Benjamin Franklin

"Quite rightly, we do not normally take the behaviour of animals as a model for how we may treat them. We would not, for example, justify tearing a cat to pieces because we had observed the cat tearing a mouse to pieces. Carnivorous fishes don’t have a choice about whether to kill other fish or not. They kill as a matter of instinct. Meanwhile, humans can choose to abstain from killing or eating fish and other animals. Alternatively, the argument could be made that is part of natural order that there are predators and prey, and so it cannot be wrong for us to play our part in this order. But this “argument from nature” can justify all kinds of inequities, including the rule of men over women and leaving the weak and the sick to fall by the wayside. "