Jacobs vs. Fishman

As I read Jane Jacobs' "The Death and Life of Great American Cities", there were many thoughts that came to mind about how did she go about picking a city to use for heranalysis. There are some portions that I agree with such as automobiles are detrimental to cities but is neccessary to getting around. Jacobs states that city planners were unable to incorporate automobile into their plan because they are too busy thinking about the appearance rather than the content or quality of the city. However, there are various factors that can alter her ideas and reason for such place as North End to go from a slum to a prosperious city.
In contrast, Robert Fisher critiques Jane Jacobs for her weak anaylsis and lack of mentioning the "great black migration". He states that the other 1960s theorist had not realized that due to migration that their ideas would not work. The great black migration caused the whites to expand out into the suburbs because of the "restrictive covenant", there was a segregation of the two. At this point, the blacks are in the city and the whites are in the suburbs. It was asked in class what was the point of putting up a fence? Many said that it was for privacy and/or protection. According to Jane Jacobs, fences are to isolate people to allow deviance. The anomie strain theory comes to mind when I think about deviance and the reason for deviance. Society pressures one to succeed but does not provide the opportunity. The lack of opportunity cause deviance.
Here is a link talking more about the great black migration
http://www.digitalhistory.uh.edu/database/article_display.cfm?HHID=443