All or many of the survivors of flight 815 are children of hostiles who left the island after the purge.
Issue's Being Resolved[]
So far the Losties are working out their parent issues in their own ways or ways they cannot help, here is a list of them (The one's with reasons next to them are what are considered a method of resolving any kind of situation);
Alex-Found a sense of faith when he tried to save her life by telling her to go to the temple (With Ben being considered her father).