alright so one day in the midst of a war between these two clans of fuckers or some shit they were like yo brah we needs us some wepons and shit so we can beat those other guys and then the scientists were like kay brah and they made the titan serum that made people a lot bigger, and regenerate faster and then they gave dem to the people and they were like DAYUM THIS SHIT WORKS but too bad cause then the evolved ppl got a sudden urge to eat people because when they grew, their brains and nerves were damaged and they started to eat ppl and they grew incredibly light because they were filled with the same pressurized gas as the one in the 3DMG and thats how they got the idea of the manuver gear and thats also why they smoke when they die and get really hot and the reason they die from the nape of the necks is explained in the manga so not even going there but anyway the reason why the regenerate is because since they are also made of regenerative super cells that duplicate 5x as fast and then when shit got really bad ppl were like dam we need to build a wall or something and then the scientist worked on the same thing except made them so big and they added the ability to turn on will so they gave that to a bunch of ppl and the lined them up in a circle and they they all turned into collosal titans and got really hard and then became the walls but since the ppl inside were such bitches dey were like bro we need seperate places cause we aint living with no poor ppl so they do that and make more walls and call them after the 3 coordinators before eren which are maria rose and sina (continuing from someone elses theory) and da ppl lived happily ever after except ryner annie and bitchetholt were like fuck u guys lol and destroyed the walls cause they is a bunch of butt hurt brats that think they are the victims even though they can turn into 60 meter giant titans that can destroy mountains and shit and they got the thingy from their hometown which is also the lab where they created titans in the first place dun dun dun and erens dad knew about this because reyner knew about eren being the coordiantor so he told his dad hey brah just give eren the serum and shit and he was like kay and gave an extra serum to the church so they can give it to historia and she can turn into a titan to destory the titans at thier origins but ymir has to be a lil bitch and ruin everything by taking the serum for herself and she also heard about the origin and she decided to go there but she also fell in love with historia so she was like i fell guilty for taking this power from u can u please be with me???????? and historia was like ya sure y not cause she is a stupid slut. so ya

bye now