hexayurt

DIY city/state

military efficient roll out emergency communities PRE designed for evolving upgrades into superior living communities

21Century supply chains

flowcharts and design patterns
multi-levels

L1 ... starve (food, water), shelter (hot, cold, flood), defence (bear attacks)
L2 ... friends and neighbourlys
L3 ... Regional Fail-Safe Systems (insurance)
L4 ... States, Nationals, Unions, Federations
L5 ... Earth Congress 

Banking Infrastructure (if REPAIR.cost$ > REPLACE.cost$) --> REPLACE

Bridge Infrastructure