or something. Ben and Widmore also can't kill each other, as described in their confrontation last season.

Locke was never meant to be the leader. The whole thing was manufactured by Jacob's rival. Jacob's rival (disguised as Locke) has Richard give Locke the compass. Locke goes back in time to 1954, hands the compass to 1954-Richard, and also mentions to Richard that he knows Jacob. This makes Richard think that Locke is special and that Locke is supposed to eventually become the leader. But he's not. That's why Locke fails the tests. He's not really supposed to become the leader. It was all a setup by Jacob's rival.

I was just thinking about that myself. The whole "Locke is a special leader" thing was engineered by the Rival, to somehowfront. Just wait until next season.

I think that's all I have to say for now!

ETA: Oh wait, I thought of more to add.

I feel confident that Jacob's enemy dude has been the smoke monster, and that he can take the form of the dead bodies on the island, which is why he was Christian for a while. I also think that he inhabited the bodies of Rouseau's pals, which is why they were acting different and weird. When they got sucked into that hole in the ground they died and came back out as the enemy dude. This could be why he killed others as well, like Eko, so he could take their bodies (but didn't end up using them).

Ok maybe mean spirited and selfish were the wrong