gangism

From gang +‎ -ism.

gangism (uncountable)

1. The criminal or antisocial behaviour of gangs.
   • 1935, James Wroten Woodard, Reification and Supernaturalism as Factors in Social Rigidity, page 194:

     […] our Western culture will certainly be in for individuation in its worst forms — political gangism, racketeering gangism, banker-broker gangism, rebate subterfuge, ruthlessly untruthful advertising, […]

   • 1998, Joyce T. Henderson, Why African American Youth are Attracted to Non-Christian/Non-Traditional Religions and Sects, page 25:

     Everything about these youths seemed to indicate gangism. In interviewing one of the women's other children who was younger than the particular son who had come it at a later time, I asked if the brother had any gang affiliation.