" Rather than focusing on stability (a systems characteristic that just isn’t present in the urban ecosystems we’re examining here), we might be better off focusing on resiliency—helping actors in the system become better able to resist shocks, bounce back from setbacks, and adapt to dynamic change. Instead of trying to hold back the tide, we should be helping people learn to swim. "

― David Kilcullen , Out of the Mountains: The Coming Age of the Urban Guerrilla