The world has often been on the cusp of collapse. There have been various "dark ages" that have lost some of the technological advancements of the past. Sometimes, this was due to changes in climate that cultures were slow to adopt to. Other times there were human-induced challenges can cause problems. More recently, there were some instances during the cold war that the world came very close to nuclear war. The end of civilization will always be close. However, the world has continued to move on.
