User blog comment:Emilia Da'len/A bitter end/@comment-1396356-20140328053834/@comment-1396356-20140328062134

It wasn't futile. They erased a majority of Comstock by having Booker retrieve Elizabeth. Thereby - allowing Booker to father Anna. Elizabeth was the last piece in all of it, in the end. She was one of the last people left involved with Infinite (The Luteces don't count). Elizabeth died like her father - they accepted it because they knew it would be for the better.