What if a person has to die and be resurrected in order to lead the others? What if Sayid shooting Ben (and Jack refusing to save Ben) actually is the reason that Ben becomes the leader of the others? I always assumed that Ben’s role in the Purge was the bargaining chip with Richard that made him the leader. But what if that’s just when Ben stepped into the role as leader? His worthiness to lead is because the island has ‘saved’ him, or because he has now sold his soul to the island for his life (which interestingly enough is not even a decision he makes but one that Kate makes for him!).
Sidenote: It’s interesting that Jack says that he’s come back on the island to do something, but what it is he doesn’t know yet. Maybe one of the things he was supposed to do was save Ben, which would have changed history. Maybe Jack’s stubbornness has messed things up royally once again!
During one of the flashes of the Losties, Locke talks to Richard. Richard tells him that he’s going to have to die, and the context seems to be in order to set things right again and save his friends’ What if Richard’s main point was ‘if you want to be our leader, you’re going to have to die, and then I’ll take care of the rest.’
We know that the hostiles/others built the landing strip; they were expecting the return of Locke. When we first see Locke alive again, he doesn’t know how he got there. He has no short-term memory, which fits in with what Richard told Sawyer and Kate about Ben’s memory if he saves him. What if Richard drags Locke’s dead body off the plane and to the temple to resurrect him? We know that Smokey likes to take lives, but what if in the temple Smokey also restores lives? The only flaw in this is that they didn’t land on the main island, where the temple and Smokey are. Kind of a big flaw, I guess.
Whatever the case may be, it seems obvious that the rules of life and death are different on the island. And something also went terribly wrong at some point, which is why women impregnated on the island cannot give birth to new lives. But I suppose that would be a whole other theory.