Protest behavior occupies a foundational position within the depth-psychological and attachment-theoretical literature of the Seba corpus. Coined in the context of Bowlby’s evolutionary account of the attachment system, the term designates the constellation of frantic, coercive, or signaling actions — crying, searching, demanding, withdrawing — that are mobilized when proximity to an attachment figure is threatened or lost. Levine and Heller provide the most explicit adult-attachment treatment, mapping protest behavior as the anxious person’s characteristic response to perceived abandonment, ranging from passive hinting to threatening to leave. Panksepp anchors the phenomenon in affective neuroscience, tracing the neurobiological cascade that follows separation — the intense vocalization and arousal of the protest phase giving way, if reunion fails, to a despair phase with measurable neurochemical depletion. Schore extends this neurobiological frame into developmental psychopathology, distinguishing the hyperexcitatory protest of insecure-resistant infants from the suppressed protest of avoidant infants, linking each pattern to specific dyadic affect transactions. Flores and Worden situate protest behavior within the broader Bowlbian architecture of attachment throughout the life cycle, with Flores noting the differential protest responses across insecure attachment subtypes. Together these voices establish protest behavior as a biologically prepared, developmentally shaped, and clinically significant signal — neither pathology nor manipulation, but the attachment system’s most direct bid for survival.