The Economy Point: How Comfort Withdrew the Load That Held Cortical Timing in Place

This paper reframes the decline of cortical timing as a setpoint no longer enforced rather than a substrate wearing out on a schedule, and argues that the reframe connects three literatures that have not been brought to the same table. The starting claim is that cortical timing has a setpoint that was fixed not by metabolic economy but by survival: there is a precision below which an animal in an ancestral environment was more likely to die before reproducing, and that floor selected the timing of the nervous systems descended from those that cleared it. The setpoint is therefore a survival floor, not an efficiency the body discovered. A setpoint selected under threat is maintained by proximity to threat, and the paper identifies three kinds of ancestral proximity that held it in place and that the modern environment has withdrawn: acute physical danger, the visible trajectory of aging and youth (now hidden by age-segregation), and the lethality of social exile. The decline this produces is positioned carefully against the established neurobiology. The age-related rise in reaction-time intra-individual variability is one of the more robust findings in cognitive aging and has a known proximate cause in white-matter degradation and dopaminergic decline. This paper does not dispute that account; it asks whether disuse accelerates it, on the model of sarcopenia as substantially a disease of disuse rather than of the calendar alone. The evidence that timing is modifiable rather than fixed is marshalled directly: reaction-time variability is reduced within minutes by feedback, is lower in aerobically fitter adults, and aerobic fitness moderates the age–variability relationship so that fitter individuals show a shallower rise. A substrate whose decline tracks fitness and responds to load behaves like conditioned tissue. The paper treats the relationship between arousal and performance with the nuance the literature requires — an inverted U rather than a monotonic gain — and argues that the ancestral environment held people chronically in the productive range of that curve while the modern enclosure drops them into chronic under-arousal. It reads several behaviors the modern world pathologizes — adolescent dread, thrill-seeking, status display, caloric bingeing — as the original calibration running against absent stakes, positioning this reading alongside, not in place of, the developmental dual-systems account of adolescent risk-taking. The felt residue of the unenforced setpoint is identified with Timing Identity Collapse: a restless search for an aliveness that comfortable life cannot supply, because what has thinned is timing itself. The argument makes no claim against comfort. Its disposition is that of a dentist toward sugar: comfort decays timing the way sugar decays teeth, and naming the cost is what makes it manageable. The intervention follows without a moral premise — if the environment will not enforce the setpoint and one is not going to leave the environment, the rational response is to supply the missing stimulus deliberately and measurably. The framework is offered as a reframe, a bridge, and a priority claim, with falsifiable predictions stated as predictions and the threshold-level evidence that would test it directly named as an open question. Funding: This work received no external funding. Conflicts of Interest: The author has no financial or institutional affiliation with any manufacturer of the instruments discussed and receives no compensation related to them. The argument is instrument-agnostic and rests on independently published peer-reviewed work.