Rules of Survival in the Apocalypse

During the 150 years when food was no longer produced, how did six generations of people survive in the narrow cracks? Can those who survived be called "human beings"? It seems that what we should least lose is exactly what we are actively giving up. If we don't give up those things, we will have nothing left, but after giving up those things, we will no longer be human. What is justice? What is fair? There is an endless thread connecting two centuries. The resurrection of mankind has just begun from the moment the disaster ended. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.