gentrifiers are new arrivals in a neighbourhood,  but gentrifiers view the community as something to be shaped, and social preservationists try to maintain the character and make-up of a community. Social preservation has a role in Jane Jacob's "generators of diversity," the first of which is that a street should be used in a variety of ways by different people at different times [ii]. A neighbourhood that is poor lacks diversity in income levels and has difficultly satisfying Jacob's first condition for diversity, because the wealthy use a street at different times and for different purposes than the poor. By gentrifying a neighborhood, or introducing rich people into a poor community, a street of "mixed primary uses" becomes more likely. The problem then becomes the displacement of the poor, because their uses of the street leave as they do. The Lister Block on James Street North "The Notre Dame House, a shelter I used to work at, has received enormous pressure over the last few years to relocate, because it's almost seen as an eyesore along James Street North," said Riaz Sayani-Mulji, a recent graduate of McMaster. Sayani-Mulji also said that the Jamesville Community Centre, his former workplace located a block away from James North, went into decline before being closed and relocated last May. The Spectator reported that the relocation of Jamesville had always been planned, and that it was simply because of more opportunities in the new location. But Sayani-Mulji said that the gentrification on James North also