Let us call a spade a spade.
A peep behind the rhetoric.
The last two wars that were fought on a global level brought large scale destruction of human life. The after effects were grave and a large majority of nations in the world had to deal with them for a long time.
World War III is a popular apocalyptic belief, so enormous in scale that if fought it will bring about the annihilation of our planet. The world has already seen two colossal wars: World War I and World War II. We know well that history has a habit of repeating itself so it is not really delusional to anticipate the mother of all wars – World War III.