Chris,
disclaimer: If this thread is ruled off-topic or out-of-bounds for this forum I will take no offense and am hereby apologizing in advance for leading the forum astray.
In most of the preparations that I see discussed on this forum I see preparations for the individual and the family to survive. This is due primarily to the fact that we only consider threats that don't include general social colapse. As the studies show the percentage chances of an event that might bring general social colapse (eg catastrophic asteroid impact) are as high as the chances of other personal level threats that we consider worthy of discussion and preparation. I think that there is something to be gained in discussing how we might prepare to survive as communities. As we discuss having sufficient water on hand to live for a few days it might also be worthwhile thinking of having a copy of "Roberts Rules" the Magna Carta and a few other choice documents, some information on how to build a forge and a smithy, how to organize and defend a small community. I recognize that these sort of preparations are the same as discussed by many fringe elements that we might want to avoid and the scenarios that get us into these sorts of survival situations are rife with low probability religio/political scenarios that we rightly might want to avoid. Nonetheless, if an asteroid impact is indeed as likely as a tornado then we might want to have some preparations for rebuilding not only our little bunker with supplies and defenses but also preparations to help build a decent community where our children and grandchildren have a chance of surviving without being thrown back into the stone age.
Just a thought - 'nuff from me, I'd imagine.
Brad