how will the world end
A good survey of people's thoughts on the end times would not seek to find out whether people believe the world will end or not. Rather, it would seek to know what their thoughts are on when and how the end will come. Regardless of the source of their belief—religious or secular—most people have come to see the idea of the end of the world as a foregone conclusion.
The idea of the end of the world refers to the end of the social order and humanity; the end of the planet as we know it. But according to the Bible, these will not all come at once.