According to simulations run on different futures of Ignis and humanity, Revolver says that Lightning's is the only one that leads to mutual destruction.
Humans know and fear death because 
it's engraved in our DNA.
Die Menschen spüren und fürchten den Tod,
der in ihrer DNA verankert ist.
Los humanos sentimos la muerte
grabada en nuestro ADN y le tememos,
Humanos conhecem o medo e temem a
morte porque está escrito no nosso DNA.