Primary Process Emotions occupies a pivotal position in the depth-psychology and affective-neuroscience corpus, designating those evolutionarily ancient, subcortically organized emotional states that operate prior to and independent of cortical elaboration, symbolic representation, or cultural conditioning. Jaak Panksepp stands as the dominant theorist, arguing through his emotion command system hypothesis that a small set of genetically ordained subcortical emotive circuits — SEEKING, RAGE, FEAR, LUST, CARE, PANIC/GRIEF, and PLAY — constitute the neurobiological bedrock from which all higher emotional and cognitive life derives. Antonio Damasio introduces a parallel but distinct tripartite framework — background, primary, and secondary emotions — in which primary emotions are amygdala-dependent responses tied to innate dispositional representations, distinguishable from both the subtler background emotions and the cognitively elaborate secondary emotions. Daniel Siegel further differentiates primary emotions from categorical or basic emotions, locating them at the initial phase of emotional response before elaborative appraisal. A persistent tension in the corpus runs between those who treat primary-process emotions as the authentic substrate of consciousness and selfhood (Panksepp) and those who regard them as necessary but insufficient components of a larger somatic-cognitive architecture (Damasio, Siegel). Joseph LeDoux complicates the field by questioning whether affect programs reliably generate subjective feelings. The stakes are high: how one maps primary-process emotions determines theories of consciousness, developmental psychopathology, and therapeutic intervention.