This summer's bushfires were not just devastating events in themselves. More broadly, they highlighted the immense vulnerability of the systems which make our contemporary lives possible. The fires cut road access, which meant towns ran out of fuel and fell low on food. Power to towns was cut and mobile phone services stopped working. So too did the ATMs and EFTPOS services the economy needs to keep running. In a modern, wealthy nation such as Australia, how could this happen? In a human sense, social systems range from the small, such as a family, to large organizations or the national...