Jacob and Smoke Monster
Ok, heres my theory.
Jacob and the Smoke Monster and enemies. The Smoke Monster can take form of any person if they have died to convince other people to do things. Now, We saw that Ben’s daughter was dead and the smoke monste took her form to convince Ben to obey Locke. (note that Locke could not go with Ben)
Locke was supposedly not dead until we saw in that big metal crate, his dead body. My theory is that since the Smoke Monster takes forms of dead people, it took form of Locke since he was actually dead. The smoke monster in Locke’s form used ben to kill Jacob.
Also, when I said “(note that Locke could not go with Ben) ” I meant that I don’t think the Smoke Monster can take two forms at once. Therefore, since the smoke monster was ben’s daughter at the time, it could not be Locke too. And so, “Locke” had to stay behind and wait for Ben. (though it was really the smoke monster)
That may or may not be the actual truth, but it just came to me and I wanted to share it. I hope it made sense!

I meant to say “Jacob and the Smoke Monster are enemies”
This has been theorized to death a lot of people beleve this if you read other peoples theorys and comments you will soon see
Yup… http://www.theoriesonlost.com/2009/06/is-new-john-locke-smokie/
🙂
How about smokie belongs to mib? Mib can use smokie to look like any dead person so he makes smokie look like Locke to find that loophole and a way to kill Jacob.
That is exactly what I was thinking!! It makes so much sense… right? Too many coinsidences to believe otherwise…