Oliver Morton argues that the U.S. should pursue a national security strategy of decentralizing and diversifying our critical infrastructures.

Clay Shirky argues against the the claim that large cities like New York are a disadvantage becuase their centralized nature makes them a likely terrorist target. He counters by pointing out that large mega-cities exist because of decntralized forces and that trying to centrally plan otherwise would be counterproductive.

Dan Gillmor argues that recent terrorist attacks demonstrate the danger in over-centralizing society in large cities.