If there really is an apocalypse your only goal is to survive it. Historically, apocalyptic events result in multigenerational dark ages, because the goal is su

If there really is an apocalypse your only goal is to survive it. Historically, apocalyptic events result in multigenerational dark ages, because the goal is survival even as population rebounds. Also, historically speaking, most population groups refuse civilization when provided the option. The visible concern to non-civilized groups when gazing upon civilization are loss of independence, loss of social equality, and social restrictions. Typically groups only accept civilization once wealth becomes sufficiently abundant, military defense of fixed areas requires fixed resources, and influence becomes more important than wealth. That being said I would take no preparations to rebuild civilization.