First theory

Hi


The bomb worked, but we don't know how far it went back.  Except, we know that Des is on the plane so does that mean that he was never on the island?  Does that mean he never met Libby, or does that mean he did actually win the yacht race?  Hugo is now the luckiest man in the world, so did his Gramps not die, did his Mum's new house not burn down?


How far back does it go?  Clearly not all that far back as they all still get born... but let's not get facetious.  Clearly it goes far back enough for some of them to make different hair choices and for the US Marshal to gain some weight.  So, maybe that is not the right question.


Maybe the right question is: how much further can we advance from this moment in time or from that moment in 2004 (was it 2004?) with two of everyone?  Which brings me to my first theory: ultimately the lost Losts will have to make a decision regarding whether they live or die, in order to allow their non-Lost selves to continue to live.    


And, what is with the cut on Jack's neck?