agency theory of fun
Arbiter of Worlds 提出的观点，认为 TRPG 游玩乐趣的关键是玩家自主性。
In philosophy, agency is the capacity for human beings to make choices and to impose those choices on the world. It’s my belief that in our everyday lives, humans in modern society feel an absence of agency. Most of our capacity for meaningful choice is illusory; our daily lives are routine, and our scope of choice limited by lack of opportunity or resources. Very few people really can “change the world” in even a small way…I believe the great enjoyment elicited by tabletop RPGs (and some video games) is a result of creating a sense of agency among their players.
由于真正的自主性意味着坏事会发生（从而破坏乐趣），但同时只有在这种情况下，PL 才能确信自己真的拥有自主性，这就意味着在这种理论下， GM从根本上就无法保证游戏必然有趣：
In order to make sure that everybody could have fun, you have to be willing to let the players make choices that lead to results that aren’t fun. You can’t guarantee the fun.