Well, it won't happen overnight, but last time this happened, the world was unrecognisable two decades later.
Big crash, bankrupt major powers fighting too many wars on too many fronts, rise of the far right, a 'fifth column' ethnicity which can be openly abused and upon whom people are encouraged to spy,.
Our world will be equally unrecognisable in twenty years time. Different players, same story. I predict terrorism from Africa next. But mostly aimed at China. South America will form its own power bloc, with Russia and China as the big monolith superpowers, and a client state Africa.
We will have to scramble to keep/rebuild what industry we have. Europe this century will look a lot like South America did last century, I think. Argentina was once the 6th largest economy in the world. It's our big downfall next.