From the introduction:
We are the inheritors of a shattered past, remnants of a civilization long lost. This is news to nobody. To the TSAB, guardians of the universe from the Lost Logia that threaten it, this phrase would simply be a reminder of all that has been lost, and the dangers left behind. For the citizens of Remnant, Huntsmen and Huntresses who protect their civilization from the predations of the Grimm, this is a dark fact of life, an understanding that whatever history may have been, there will be no victory in the strength it once possessed.