I think Ben has existed in two different timelines. He's able to see the
future that exists off the island. That would explain how he knows so
many
details of everyone's life and how he so easily manipulated people. Given
how the 2/14 episode ended, Sayid could be Ben's man on the boat.
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"There would be a lot more civility in this world if people
didn't take that as an invitation to walk all over you"
(Calvin and Hobbes)