The island called many people for a specific purpose, ensuring that they were all in the middle section so that they would survive and be in the right places. Unfortunately, those who the island did not have a purpose for could not be allowed to live. The entire tail section SHOULD have died, but the island was not counting on Bernard being in the tail section. The island NEEDS/NEEDED Bernard, but he couldn't survive on his own, so it kept others alive too. The island improvised and made purposes for Libby, Ana Lucia and Eko. However, they were not called to the island and therefore could not be allowed to live. This fact is agreed on by both smokie and Jacob, so they both set in motion plots to make sure that Libby, Ana Lucia and Eko did not live past what was necessar