What,according to you, is the underlying theme of Twilight?

If you're forced to 移動する in with your father, あなた may just end up with a family of vampires, who are hated によって your bff werewolves, but it'll work out because one of them will fall in 愛 with your daughter. ._.

Life choices/free agency.
あなた don't have to accept または take what's handed to you. あなた always have the option to make what あなた want happen.
The Cullens chose to deny their nature and have high morals.
The choice to resist temptation.
Bella chooses Edward, despite the odds being stacked against her.
And so on.

The opposite is demonstrated with the Quilieutes (I always spell that word wrong). I think it adds to the theme, 表示中 what life would be like if あなた didn't have many choices.

That's the main one, I think.