In Chapter 1 of Triumph Of The City Edward Glaeser gives vivd examples of why cities are of so much importance. He starts off by showing the importance of being in close proximity giving examples of Athens saying “Ideas move from person to person within dense urban spaces, and this exchange occasionally creates miracles of human creativity” (38) . He goes on to speak of the sustainability of cities giving an example of the success of the barbarians being able to capture Rome however not having the knowledge of up keeping ultimately leading to what he states as “knowledge itself moved backward” (30). Edward credits cities for aiding in the immunity of diseases through exposure and our incredible gains in military warfare. Diffusion of information