the end of the Cat's cradle

I personally think the end was pretty straight forward. At the end everyone died and the world sounds like it ended. Kurt Vonnegut wait till this moment showing the whole idea. At last he describe the book name cat's cradle. He satire the humanity of this society. I think he just criticized the region and the humanity. From my perspective of what he trying to do was to tell that cat's cradle is similar to life. From previous pages He is trying to tell the reader that Cat's cradle is a fun looking string game that means nothing and telling that the religion today is phony.