that was my first thought with what he meant by saying the island was mine. that he was the leader before ben.
But oops that was the first time the others ,the ancients i like to call them ,brought the wrong chosen one to the island.
We haven't been told who was the first leader and so on. It could have been Hanso for all we know that was first. We're not even sure how long the island has been around for to even make a educated guess on who's been a leader for the island.
I'm thinking they sacrifice their leaders, for the island of course.