“Their relationship echoed, in many ways, the binds of trust and mutual protection that kept prisoners alive and sane in Nazi concentration camps. In those camps, researchers found, the "basic unit of survival" was the pair, not the individual.” SurvivalCooperationEvolutionary PsychologyInterdependenceMutual AidSymbiotic RelationshipSpecies Longevity Book:Escape from Camp 14: One Man's Remarkable Odyssey from North Korea to Freedom in the West Source: Escape from Camp 14: One Man's Remarkable Odyssey from North Korea to Freedom in the West