A logical problem about three-body

Predicting the era of eternity and chaos is to decide when to dehydrate. Dehydration will temporarily stop the evolution of civilization. In a constant era, people don't have to be dehydrated, and civilization can enter a period of rapid development. There may be a technical explosion during the development period (see three body 2 for details). As long as there is a technological explosion in a civilization, it is possible to get rid of the bad three-body world and live a normal life. Mobile phone calls in the middle of the night, hope to adopt.