Read the context
Someone will shoulder the centuries of history and challenge the world
WG fears the great war that will come then ...
Meaning - learning void century and what happened....this means getting one piece or become PK - just like how roger did.
Once luffy gets one piece or learn about void century he will declare wat against world government and thus will turn whole world upside down
Since the beginning the story is about void century cleansing - and, wg is a the one who did it. They are the EOs opponent.
Thats a retarded reason. You think someone like Luffy will be pissed of and mad just because of learning ancient history?
You sure you know how Luffy acts?
Luffy cares about his crew, he isn't a revolutionary.
Thats exactly why it makes sense why One Piece is over with finding One Piece. I don't see how Luffy will be motivated after learning ancient history, Luffy doesn't read even 1 book in his life now he will declare war by learning ancient history?
Government is already in war with SH pirates at this point.