Board Thread:Speculation House/@comment-25857155-20150116082950/@comment-26018514-20150218144225

VedranTheII wrote: 73.Anon.52 wrote: ... then had a "dark ages" where their tech was incompatible and they lost all of their history(as well as finding both dust and grimm). ...err...you don’t...or rather you CAN’T just...LOSE history. It can be hidden, replaced and eventually destroyed, yes...but that takes a conscious effort from the winning side and even then it could take generations to bury the history (think romans)...the grimm aren’t sentient enough to pull this off so unless Remnant had a very violent world war that somehow created the grimm and convinced every survivor to never...mention...it...a...gain...but that would just be crazy... I'm not saying they merely "lose" a document and their history is lost... I'm saying the last computer/equivalent tech is destroyed(generations after the last physical recording methods, like books... were used), as their engineers are lost to the first few encounters with grimm, after which their focus shifts completely to killing grim... for generations.

The grim are stated to aggressively attack man-made tech, so it isn't crazy to assume humankind would have lost their original technology, especially in a homeworld refugee/lifeboat scenario, while the humans were stated to be losing to grimm until they found dust.