Then when the climate changes or barbarians invade, overstretched institutions break down and civil order collapses, aggravated by tightly coupled networks that create the potential for propagating failure across many critical industries.
What emerges is a less complex society, organized on a smaller scale or that has been taken over by another group, and loss of our hard-earned knowledge.
Possible solutions include distributed and decentralized production of vital goods like energy and food and adding redundancy to the electrical grid and other networks.
I've never considered civilization anything more than a passing phase. It seems essential because it's all we know, but when we look at it squarely we find at least as many inherent flaws as benefits. I say it's time to venture out of the womb and look around.