Half as many people will not support half as many enterprises In a given geographical territory, half as many people will not support half as many such enterprises spaced at twice the distance. When distance inconvenience sets in, the small, the various and the personal wither away. Jane Jacobs, The Death and Life of Great American Cities densitydistancegeographybusinesseconomics
If children are transferred from a lively city street In real life, what significant change does occur if children are transferred from a lively city street to the usual park or to the usual public or project playground? In most cases (not all, fortunately), the most significant change is this: The children have moved from under the eyes of a high numerical ratio of adults, into a place where the ratio of adults is low or even nil. To think this represents an improvement in city child rearing is pure daydreaming. Jane Jacobs, The Death and Life of Great American Cities The ground plane childhoodadolescence