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This opening chapter frames aging through both a personal lens and a biological one, beginning with Dylan Thomas’s call to “rage against the dying of the light” and the author’s own decision, at age 91, to join early human trials of mitochondrial transplantation. It introduces the central thesis of the book: that aging is driven primarily by the progressive failure of mitochondrial DNA and the resulting collapse of cellular energy production. Using an extended analogy contrasting well‑protected nuclear genes (“NUGies”) with vulnerable mitochondrial genes (“MUGies”), the chapter illustrates how differential environments and repair capacities lead to disproportionate damage in mitochondria, triggering the systemic decline we recognize as aging.

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Going Gentle into That Good Night? An Analogy

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  • 发表日期：

    2026年

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  • John G. Cramer

摘要

This opening chapter frames aging through both a personal lens and a biological one, beginning with Dylan Thomas’s call to “rage against the dying of the light” and the author’s own decision, at age 91, to join early human trials of mitochondrial transplantation. It introduces the central thesis of the book: that aging is driven primarily by the progressive failure of mitochondrial DNA and the resulting collapse of cellular energy production. Using an extended analogy contrasting well‑protected nuclear genes (“NUGies”) with vulnerable mitochondrial genes (“MUGies”), the chapter illustrates how differential environments and repair capacities lead to disproportionate damage in mitochondria, triggering the systemic decline we recognize as aging.