A controversial “tactics” scale of this phenomenon measures its occurrence in families. Robert Blake and Jane Mouton identified “forcing” and “withdrawal” among five methods of managing this phenomenon in the workplace. A study that created this phenomenon among 22 boys at an Oklahoma summer camp later reduced it (15[1])with an “integration” phase. This phenomenon names a macro-sociological theory opposed to functionalism that examines how dominant institutions perpetuate (*) inequality by controlling resources. Donald Campbell developed a “realistic” (10[1])model of this phenomenon (-5[1])that was supported by the Robbers Cave experiment. Marx argued that history is driven by this phenomenon (10[1])between the bourgeoisie and the proletariat. For 10 points, name this phenomenon in which groups are at odds due to opposing interests. ■END■ (10[1])