User blog comment:TheAnime/What are titans?/@comment-123.231.125.174-20140731071917

My theory is that The titans were created by the government as super soldiers to rule the world. bringing everyone under one rule, stop overpopulation and war amongst people because of their race/nationality etc.

When the scientists first created titans they had some flaws, the titans were driven by pure instinct. they forget how it's like to be human once they turn into a titan. they spread like an epedemic disiease.. and took over the world, causing humans to flee and live within walls,

The Scientists still didn't stop experimenting and fixing the flaws, they tried to make better titans, Some scientists like yager were working on curing this disease and ended up creating titan shifters, humans who have control over the titan form. this might explain why erens titan form was only triggered after he was inside a titan, he might have been given a vaccine of some sort by his father, the titan shifters have control over the titan form. all this may not be true. it's just my theory.

how titans reproduce is a mystery. I really want to know how titans form/reproduce. I tried thinking up of theories but I can't get any that's good enough