Drawing from the recent scholarly attempts to stipulate the conditions associated with the appearance of state terror, the authors delineate two major ideologies which have guided the Argentine military to perpetuate state terror as standard policy. In national security and free market ideologies, the Argentine rulers of the Proceso period found the rationale for making the disappearance of real and perceived adversaries a daily governmental routine. Combined, these ideologies provided motives to sustain high levels of repression and guidelines to select its victims. Demonstrates that individuals suffered a greater probability of victimization if they were members of particular trade unions perceived by the government to have obstructed its achievements of economic and security goals. These and other trends lead to the conclusion that ideology was a motivating force behind the infamous Argentine "Dirty War'. -from Authors