I cannot imagine how we could have a real collapse of our civilization, unless you really stretch the word definition. Even in the most catastrophic scenarios like a nuclear war or a dinosaur-scale meteor hit, enough people should survive to gradually rebuild it to the current level.
And the risks mentioned here, like resource shortage, conventional war and economic problems cannot even lead to that sort of "collapse". The words you might consider are "crisis", "depression" or maybe "decline".
It would take a true cosmic scale disaster to destroy our civilization at this point, something that would make life impossible anywhere on the surface or under it in a very short time. Even then, if we had an early warning, we could try to relocate enough people off the planet.
If you want your research to be taken seriously, please avoid sensationalist overstatements like this.