To generate exuberant diversity in a city's streets and districts four conditions are indispensable: 1. The district, and indeed as many of its internal parts as possible, must serve more than one primary function; preferably more than two... 2. Most blocks must be short; that is, streets and opportunities to turn corners must be frequent. 3. The district must mingle buildings that vary in age and condition, including a good proportion of old ones so that they vary in the economic yield they must produce. This mingling must be fairly close-grained. 4. There must be a sufficiently dense concentration of people, for whatever purposes they may be there...

PubliJane Jacobsd in 1980 and reprinted in 2011 with a previously unpubliJane Jacobsd 2005 interview on the subject Jacobs' book advances the view that Quebec's eventual independence is best for Montreal Toronto the rest of Canada and the world; and that such independence can be achieved peacefully. She calls these two patterns "Moral Syndrome A" or commercial moral syndrome and "Moral Syndrome B" or guardian moral syndrome. C.

She has been accused of inattention to racial inequality and her concept of "unslumming" has been compared with gentrification. As a female writer and mother who criticized experts in the male-dominated field of urban planning Jacobs endured scorn from establiJane Jacobsd figures who called her a "housewife" and a "crazy dame". Her influential book The Death and Life of Great American Cities (1961) argued that urban renewal did not respect the needs of most city-dwellers.