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
highdensityandovercrowding They hated both equally, in any case, and coupled them like ham and eggs, so that to this day housers and planners pop out the phrase as if it were one word, “highdensityandovercrowding.” Jane Jacobs, The Death and Life of Great American Cities densityurbanism
To deter crime “To deter crime,” Cisneros explains, “spaces should convey to would-be intruders a strong sense that if they enter they are very likely to be observed, to be identified as intruders, and to have difficulty escaping.” Geoff Manaugh, A Burglar's Guide to the City Eyes on the street