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Published February 12, 2026 | Version v16
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The Evolutionary Function of Dreams: From Symbolic Cognition to Biological Encoding

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This paper proposes an alternative framework for understanding evolution, emphasizing the cognitive and symbolic functions of dreams as active mechanisms in species-level adaptation. Unlike conventional models that rely on random mutation and natural selection, this approach suggests that the brain, particularly during deep-level sleep, engages in a structured symbolic analysis of environmental stimuli. These symbolic processes—emerging through layered dream states—serve not only for psychological regulation but also for long-term adaptive design. The study introduces a tiered model of dream depth (D-0 to D-4) and explores the potential biological role of internally generated radiation signals during symbolic dreaming. The schizoid process is discussed as a neurocognitive state that may facilitate this symbolic restructuring rather than reflecting pathology. Examples from non-human species and mythological storytelling are examined as evidence for dream-driven behavioral and morphological adaptation. The paper concludes by exploring the possibility of transitioning from subconscious adaptation to conscious evolution through understanding and guiding the dream mechanism.

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Preprint: 10.5281/zenodo.15650880 (DOI)

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