User blog comment:Raul123alin/My theory about the origin of the titans/@comment-216.98.114.82-20150925195206

My theory is that titans are actually bio-weapons used outside the walls for some unknown war. The people inside the walls are thus slaves used as living bombs, to attack the enemy wherever they may be, since somehow humans can become titans through a syringe. Thus the Reiss king created the walls to save the people from such a horrific fate. I think that is why all the Reiss inheritors were reluctant to allow the walls to come down. Even the uncle reiss seemed satisfied with the status quo when he was talking with psycho ackerman. Also, i think that the Ackerman family are royalty and the Reiss family used to work under them, but when walls went up, memory changed, and thus Ackerman familiy lost power.

--Kawaiiloverq