Altered state of consciousness , Avatar , Consciousness , Continuity hypothesis , Dreaming , Evolutionary psychology , Inclusive fitness , Kin selection theory , Need to belong , Practise and preparation hypothesis , Reciprocal altruism theory , Simulation , Social brain hypothesis , Social mapping hypothesis , Social simulation theory , Sociometer theory , Strengthening hypothesis , The dream self , The inclusive fitness theory , Threat simulation theory , Virtual reality , Virtual reality metaphor