"The World" is defined by the countries and regions we categorized on this planet.....As in the term "worldview" is what we used to describe our perceptions of modern reality.
If you mean, how will this "planet" end.....then it could be anything..... 5 Billion years from now? Or as soon as I hit 'Post Reply' on this post, as no government would tell it's people that a planet-cracking meteor is on it's way to break this globe into piece, the government will just keep using facebook and twitter to say "conspiracy theory" until the meteor is an inch above your head....and you'd be none the wiser.
...but as for the "world"....? Skyscrapers, Cars, Disneyland, the internet, good whiskey, and the Beatles collection?.... 10-20yrs....China will try to claim Taiwan, US says no, China whips it's dick out, US will whip it's dick out,...then it's WW3.... for about a week, because China has done well to subvert western strength with tik-tok fads and flavor of the month virtue-signaling campaigns, people of the west have become too weak-willed or addicted to meth because they thought ANTIFA was cool....so they can't/won't pull a trigger and defend their land.... THEN Russia will come from the East-side, and get some of that sloppy seconds....
It'll basically be "Man in the High Castle", but it'll be China and Russia doing the spit-roastng, instead of the Japanese and the Nazis.....