Cited by 676Sleep and Wakefulness ResearchSleep and related disordersPsychoanalysis and Psychopathology Research

The reinterpretation of dreams: An evolutionary hypothesis of the function of dreaming

Revonsuo, Antti·2000·Behavioral and Brain Sciences

Abstract

Several theories claim that dreaming is a random by-product of REM sleep physiology and that it does not serve any natural function. Phenomenal dream content, however, is not as disorganized as such views imply. The form and content of dreams is not random but organized and selective: during dreaming, the brain constructs a complex model of the world in which certain types of elements, when compared to waking life, are underrepresented whereas others are over represented. Furthermore, dream content is consistently and powerfully modulated by certain types of waking experiences. On the basis of this evidence, I put forward the hypothesis that the biological function of dreaming is to simulate threatening events, and to rehearse threat perception and threat avoidance. To evaluate this hypothesis, we need to consider the original evolutionary context of dreaming and the possible traces it has left in the dream content of the present human population. In the ancestral environment human life was short and full of threats. Any behavioral advantage in dealing with highly dangerous events would have increased the probability of reproductive success. A dream-production mechanism that tends to select threatening waking events and simulate them over and over again in various combinations would have been valuable for the development and maintenance of threat-avoidance skills. Empirical evidence from normative dream content, children's dreams, recurrent dreams, nightmares, post traumatic dreams, and the dreams of hunter-gatherers indicates that our dream-production mechanisms are in fact specialized in the simulation of threatening events, and thus provides support to the threat simulation hypothesis of the function of dreaming.

Integrity signals

Registry

Crossref · 10.1017/s0140525x00004015

Cites

1405 of 1405 references verified0 citation errors · 0 not checkable

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  • Dreams can contribute to consolidation of memories with a great emotional load and can also represent a mechanism to simulate the real world as problem-solving based on emotional coping strategies.

    “Hence, dreams not only can contribute to the consolidation of memories with a great emotional load, but it can also represent a mechanism to simulate the real world as a sort of problem-solving based on emotional coping strategies, according to Revonsuo (2000) and Revonsuo et al. (2015).”

    From The Functional Role of Dreaming in Emotional Processes (2019) · cites this paper as Revonsuo (2000)

  • Many dreams contain simulations of threats.

    “Indeed many dreams contain simulations of threats ( 62 ).”

    From Prodromal dreams (2025) · cites this paper as [62]

  • The threat simulation theory of dreams and the social simulation theory posit that dreams are biased to simulate threatening and social situations.

    “The threat simulation theory of dreams and the social simulation theory ( 62 , 63 ) posit that dreams are biased to simulate threatening and social situations.”

    From Prodromal dreams (2025) · cites this paper as [62]

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Authors
Revonsuo, A.
Affiliations
University of Turku (FI)
Corresponding author
Revonsuo, Antti
Venue
Behavioral and Brain Sciences
Published
2000-12
Volume
23
Issue
6
Pages
877-901
ISSN
  • 0140-525X (ISSN-L)
  • 1469-1825
OpenAlex
W2110375253
Cited by
676
References
1,410
Citations by year
2026: 22 · 2025: 55 · 2024: 34 · 2023: 28 · 2022: 46 · 2021: 49 · 2020: 37 · 2019: 43 · 2018: 28 · 2017: 38 · 2016: 26 · 2015: 25 · 2014: 25 · 2013: 31 · 2012: 20
FWCI
3.19
Type
journal article
Language
en
Open access
closed
Locations
  • Behavioral and Brain Sciences (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
  • Social Sciences › Psychology › Clinical Psychology › Psychoanalysis and Psychopathology Research
Keywords
evolutionary hypothesis, REM sleep, dream content, threat avoidance, threat perception, nightmares, children's dreams
MeSH terms
Animals, Arousal, Brain, Dreams, Biological Evolution, Fear, Humans, Learning, Problem Solving, Psychophysiology, Wakefulness

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