What may feel like a victory just leads to more terrifying weapons, and more
evil. I'm not talking about the Ring as an allegory for nuclear weapons,
but rather as a metaphor for all machines, or what Tolkien called the Machine
(see the link in my footer). Morgoth himself was something of a
technologist, particularly a bioengineer.
Keep in mind, by the way, that Morgoth was weakened because he used his powers
to taint Middle-earth. All of Middle-earth is his Ring. Because of
that, he cannot truly be destroyed without destroying or remaking Middle-earth,
just as Sauron could not be destroyred without unmaking the Ring. Even
from the Void, Morgoth continues to command the allegiance of all that is evil
in Middle-earth -- despite Sauron's pretences to the title, Morgoth is
still the true Dark Lord. The fact that his body could be wounded
or killed did not make him any less immortal, and his spirit could not be truly
reduced to impotence until Eru himself intervenes and turns Arda Marred into
Arda
Remade.
“I dislike Allegory - the conscious and intentional allegory - yet any attempt to explain the purport of myth or fairytale must use allegorical language. (And, of course, the more 'life' a story has the more readily will it be susceptible of allegorical interpretations: while the better a deliberate allegory is made the more nearly will it be acceptable just as a story.)” (From Tolkien Letter # 131.)