So there's a possibility that titans were made from humans... whaaat. Means they've been killing what used to be people to save humanity? Kind of ironic. Great chapter, though, and pretty sad about what happened to Irvin.
Spoiler
Isnt it typical tho? It makes perfect sense. Humans are always trying to find better weapons to beat eachother. So its just a matter of time before they make something they cant controll.