The document discusses various types and levels of change including incremental, seismic, utopian and apocalyptic change. It examines how assumptions around suburbia like cheap energy and land are at risk. Case studies show how cities have transitioned from motordom to more sustainable transit-oriented forms. While plans may be useless, planning for disruptive change is indispensable. Decision-makers should plan for incremental strategies but anticipate seismic shifts, and work towards small changes that can make a positive difference over time.