“The Call of the Blood” : Debating the Restoration of Children of the Disappeared in Post-Dictatorship Argentina During the military dictatorship in Argentina (1976-1983), an estimated 30,000 people disappeared, including 500 newborn infants and young children. The majority of these children were handed over to military families who raised them as their own. Las Abuelas de Plaza de Mayo (The Grandmothers of the Plaza de Mayo) is a human rights organization that was formed in order to locate their missing grandchildren and restore them to their biological families. During the formative years of the organization in the 1980s, the organization adopted arguments in favour of restitution that were based on a prioritization of biological ties. This rhetoric shapes the organization’s discourse in the present. This article will analyze their belief in the “call of the blood” as it informed the group’s post-dictatorship pursuit of justice.