A mass extinction of life on Earth as a result of willfully generated climate change is certainly one of the most daunting outcomes that civilization currently faces. But it is certainly not the only danger.
Nuclear war, killer asteroids, coronal mass ejections, artificial intelligence, pandemic, super-volcanoes, and many other events of lessening probability have the potential to end civilization as we know it before all of the honeybees die.
Leaving aside the certainty of climate catastrophe, what other events could occur that have the potential to destroy our civilization?
This view seems to intersect with complex system failure, whereby it is observed that the more complex a system, the greater likelihood of failure.