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This theoretical framework proposes kyōzai as a key factor in cultural evolution, emphasizing emotional sharing in human survival.
Darwin’s theory of natural selection explained biological evolution through adaptation and survival, but it cannot account for why only human beings developed language, culture, and mind. This work proposes a second axis of evolution: kyōzai, the sharing and resonance of emotion with others. In the primitive stage, groups were formed through cries, expressions, rituals, and song; with the acquisition of language, this sharing of emotion evolved into the sharing of understanding and acceptance. What proved decisive was the capacity to reconstitute groups through shared emotion — humans could survive the loss of leaders or kin by forming new bonds, and could belong simultaneously to multiple groups across blood, geography, and culture. Culture, religion, ethics, and civilization all function as vessels for sustaining and extending interference; reason itself evolved to maintain kyōzai within enlarged groups. Modern sports, art, and social media are further extensions of the same drive. Neuroscientific findings — mirror neurons, emotional contagion, neonatal imitation — suggest that interference is genetically embedded. The fundamental proposition: human beings do not interfere in order to survive; they live in order to interfere.
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SHINO SANADA (2026) studied this question.
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