User blog comment:Ocomfv/Theory on the origan of Grimm/@comment-24513473-20141029224643/@comment-25399622-20141029230558

But isn't Dust something that manifests when triggered by human/faunus Auras? So how can you really destroy it? Maybe the Grimm are just metaphors for the struggles mankind faces because of their own emotions (without necessarily directly pitting different groups within the society against each other, since there is now a common enemy). The other point being that we often sacrifice things for technological advance, and that arms races have no end - but we still go for them, because what is the alternative? Potential destruction?

One of the reasons I love this series is because the social interactions and messages are so real and applicable.