One Piece's Theory

As we know, there was an age called “The Void Century” in OP’s world timeline. Except Roger’s pirate, not a single living soul on 

this planet have any idea what the really happened within that gap.

Roger’s will that Whitebeard was talking about, it actually wasn’t his original will. Roger inherited it as well from waaay back then,
 from 800 years ago to be precised. Yes, it was originally the will of The Ancient Kingdom (let’s call it AK from now on).

However they had an issue. As we know, the planet of OP contains of big four seas, east, west, north, and south, each were separated by the Red Line and the Grand Line. The AK saw Red Line and Grand Line as a big obstacle because they have been
 been preventing people from traveling from one sea to another, thus preventing the AK from reaching its full prosperity as well.

And So they made this project, an insane one, but has to be done. The project was about eliminating the Red Line and Grand Line to fuse the 4 seas into one big ocean( the ALL BLUE), the united ocean. The called it the project of “One Piece”. In order to do so, they started to build some weapons which will be strong enough to destroy the red line (later called Ancient Weapons)

It turned out that not everybody was pleased by this project.. you know, politics. Some other kingdoms were totally against it, they smell a conspiracy was playing behind it. But the AK stood their ground no matter what. Guess what happened next? a huge war broke out. It’s the AK vs 20 kingdoms who were against the prject of "One Piece”. 

The 20 kingdoms came out as the victor and they declared themselves as The World Government. Meanwhile the AK was reduced to shred, along with all their historiy, and the “One Piece” project was never heard again since then.

Unexpectedly, The AK has anticipated their downfall. Before the war begun they had carved historical notes on these certain metals which as hard as diamond(later called the poneglyphs) and hid them throughout the world, along with the weapons they’ve built. The AK really wanted to make sure that their desire wouldn’t die in case of anything bad happened to them.

the WG was mad with this fact and completetely prohibit any form of poneglyph dechipering.

but it's too late, the will has been passing through ages since then… silently waiting for someone to recieve the massage.

800 years has passed, a pirate named Roger sucessfully reach Raftel and discovered the true history. He knows exactly what to do, but unfortunately his body didn’t allow him to… he had this incurable disease, remember? whereas the project needs a lot of power and time to complete, 2 things that Roger didn’t have that time.

Therefore, he decided to create The Golden Age of Piracy instead, hoping that there will appear someone who is strong and righteous enough to complete the massage in his place. 

Who will be that ‘someone’? I think we all know the answer. 



now the Fishman Island located 10,000 meters below reverse mountain.. if they destroy the reverse mountain the FI will also destroy


How so? Here’s another theory :

The ancestor of FI(fishman island) were actually well awared of this upcoming event.


Joy Boy, he was actually the king of the AK.
Like a said, destroying both reverse mountain and fishman island is a must to complete the project. Therefore, King Joy Boy made a proposal of destroying FI to the former mermaid princess, Poseidon. She agreed but as an exchange she asked Joy Boy to move her people to a better place on the surface. Joy Boy gave a nod and started building Noah Arc afterwards. 

Joy Boy managed to finish Noah but short after his kingdom lost a great battle against the 20 kingdoms. The promised cannot be fullfilled and he apoligized to Poseidon through poneglyph. However he still promised her “that day” would eventually come in the future, the day when fishmen and mermen live under the sun.


Conclusion : “The promised day” and madam shirley’s prediction, they are actually the same thing. 

The scenario is pretty simple : at “the promised day” Luffy will trigger the attack on the destruction spot, but before that, Shirahoshi will command the seaking to move all of the FI’s citizen to a safer place (by using Noah).



the images show the project ONE PIECE






Taken from One Piece by Eiichiro Oda page ( facebook )