The fifth and final approach is social movements. This theoretical approach is focused on the analysis of ideologically based movements, usually in terms of leader-follower relationships. Those who support gentrification are encouraged by leaders (successful urban pioneers, political-economic elites, land developers, lending institutions, and even the Federal government in some instances) to revive the inner-city. Those who are in opposition are the people who currently reside in the deteriorated areas. They develop countermovements in order to gain the power necessary to defend themselves against the movements of the elite. An excellent example was the turned around gang in Chicago who fought for years against the Richard J. Daley machine: the Young Lords led by Jose Cha Cha Jimenez. They occupied neighborhood institutions and led massive demonstrations to make people aware. These countermovements can be unsuccessful, though. The people who support reviving neighborhoods are also members, and their voices are the ones that the gentrifier tend to hear.