"To us it seems incredible that the Greek philosophers should have scanned so deeply into right and wrong and yet never noticed the immorality of slavery. Perhaps 3000 years from now it will seem equally incredible that we do not notice the immorality of our own oppression of animals."

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I do not oppose violence simply because it is counterproductive. I oppose it because it betrays animal rights philosophy. Those who resort to such tactics really have not understood that animal rights is about the extension of moral concern to all sentient beings--humans obviously included.

— Andrew Linzey