"The only thing that permits us to acquiesce in an erroneous theory is the lack of a better one, analogously, an injustice is tolerable only when it is necessary to avoid an even greater injustice."

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Such is the condition of organic nature! whose first law might be expressed in the words 'Eat or be eaten!' and which would seem to be one great slaughter-house, one universal scene of rapacity and injustice!

— Erasmus Darwin