The Threshold Is Not a Line. It Is a Cliff. You have been sold a story—a comfortable, linear fable of gradual maturation, of steady steps from adolescence into adulthood, of a gentle slope upward into responsibility. It is a lie. The biology knows it is a lie. The epigenome knows it is a lie. And…
Introduction: Aging Is Not Linear The conventional model of aging is a gentle slope. You are young, then you are less young, then you are old. The decline is gradual. The clock ticks at a constant rate. That model is wrong. Biological aging is not a linear process. It is a series of threshold transitions—discrete,…