Board Thread:Speculation House/@comment-4830106-20130803022158/@comment-9090085-20130806003901

Angren Túrë wrote:

ANYWAY, this is something I've always wondered: Are the Grim always there, or do they make periodic resurgences? The implication in the Intro definitely pointed to the Grim coming back in force, but Ozpin implied that "monsters" are always present in the RWBYverse.

Perhaps it isn't the Grim themselves coming back, but their central intelligence is gathering strength. So the Big Bad is pretty much going to be like Sauron--He returns triumphantly after getting beaten off a thousand or so years ago, and takes control of all the wild Grim and bends them to his own will.

So I guess this means that while the Grim by themselves are simply chaotic and destructive, the guidance of a hive mind or hierarchy would make them evil. This makes total sense to me. It would even explain the general complacency of human society in this world - They haven't fought against an intelligent force in generations.