Board Thread:Manga/@comment-7278867-20170312084406/@comment-33077628-20200905004912

If the people of the world are indeed humans and can't have their memories meddle with, they have been fighting against the 9 titan warriors for almost 2.000 years. They must have noticed by now that their power is transferred to another eldian every 13 years. I imagine there's a lot about the titans the people of the world know by now just from observation and deduction.

We know the Marleys probably knew about the importance of royal blood because Kruger wanted to keep it a secret from them that Dina was of royal blood.

The curse probably exists, because it's very unlikely that all those previous Founding Titan Kings, with supreme power over all the other titans, would have all allowed somebody else to eat them, all in 13 years intervals, if they could have chosen not to and lived until the end of a normal lifespan.

We can also assume that the curse of the titans can't be lifted even by a  Founding Titan with royal blood, like Karl Fritz, because if it were possible, he would probably have done it in his time to end the titan horror. The only thing I imagine has never been tried before is to have someone inherit the power of all the 9 titans. Maybe then, with a "unite Ymir", it can be possible to do so.