I postulate that any genuinely major technical advance would destroy the world.
Teleportation, FTL travel, free energy, anti-gravity....any of those things would completely destroy the economic and social structures of the world and plunge it into chaos like never seen beofre.
Whole industries would collapse overnight, taking the financial pinnings of the planet with it.
Telelportation alone would make obsolete nearly everything we do, and how we do it. All trucking, moving, and transportation-related industries would die off in a heartbeat, along with the social structures that both supported and used them. Total world-wide collapse of most industry and manufacturing business would follow, and it might not be the kind of thing that we'd survive.
If 90% of the jobs today suddenly disappeared due to something like this, can ou imagine the anarchy that would ensue?