PvP (Player versus player combat) is the catalyst for change in Ashes of Creation. Player combat is intended to be meaningful, ranging from Caravan battles to vast open world conflicts fought for the pride of Kings and Queens.
Because players are motivated by different things, because they want something from the game that other players don't want, that's going to cause people to butt heads. Different players are going to want different experiences and the conflict between the two of them will create a bigger and better thing. Out of strife comes rebirth and that's a core symbol, it's a core theme that occurs throughout the game. – Jeffrey Bard
Just because our flagging system gives corruption to pkers, doesn't mean PvP won't happen. There is plenty of reason for PvP to occur open-world. Scarce resources, open world hunting grounds, caravans, sieges, guild wars etc. – Steven Sharif