Comment by AlotOfReading

You definitely do not want a simple system if your singular goal is resiliency. The most resilient systems we know about are all complex, from ecosystems to organisms to cities to the internet itself. The main problem is that our current toolkit is so primitive that understanding anything about them, from how to intelligently intervene to how resilient any particular system is at any particular point in time is damn near impossible. There's a lot of research trying to change that, but it's obviously a difficult problem.