User blog comment:MeDeoPal/On the Origin of Titans and Shifters/@comment-174.131.130.173-20150726225904

I think your theory is good but the thing you were wrong about is the beast Titans origins. Maybe he was that Titan who couldn't control his Titan body and started turning everyone into Titans. He couldn't have controlled it until he did when he ate a Titan shifter one day and started to have created an evil plan. Because he has the ability to do that, plus Ymir did say that he was the one responsible for the breach of wall rose sense she was a Titan for 60 years and might know info. About the Titans and where they came from.