Damn, it took me a while to find this thread. Now, I was doing some thinking about the manga and I could not help but wonder where in the hell would devil fruits come from. Now, we know for a fact they are "fruits" and fruits generally come from trees(duh, but bear with me). Now, if devil fruits being fruits come from trees then it is unlikely a devil fruit would come from a regular tree, it would have to be a special kind of tree with special properties since it is producing a fruit with a curse in it. Now, this is where it gets interesting, the manga has indeed shown a special tree with special properties. In fact, it has named 2 such trees; the adam and eve trees. What if those two are the origin of devil fruits? The devil fruit, the cursed fruit, the forbidden fruit comes from the adam and eve trees. Beautiful, see where I am going? Oda went biblical on us here lol. Its so obvious its not even funny (if someone thought of this before, well, bite me lol). Now, the other interesting part is that for the world government to not have absolute control over DF if my little theory is true is that a special mechanism would have to exist so as to spread the fruits around the world in such a way that the world government can no do anything about it. Maybe they get released into deep, sea king infested sea currents, maybe they are released as seeds to the wind and turn into fruits hundreds of miles away.... There could be other possibilities but it is up to oda.