The Future of Longevity Medicine: Repairing the Parts or Preserving the Whole? Holmes’ Carriage as a Metaphor for Two Fundamentally Different Models of Aging

Modern longevity medicine is increasingly focused on repairing age-associated biological damage through gene therapies, epigenetic reprogramming, regenerative medicine, senolytics, and AI-driven interventions. While these approaches may significantly extend lifespan, they predominantly address aging as a process of fragmented molecular and cellular failure. In this conceptual essay, we propose an alternative perspective based on the distinction between “fragmented aging” and “coherent aging,” illustrated through the metaphor of Holmes’ carriage. Fragmented aging describes progressive systemic decline driven by sequential failures of individual biological subsystems requiring continuous technological intervention. In contrast, coherent aging describes a state in which biological systems preserve long-term functional integration and systemic harmony, resulting in delayed morbidity and a compressed terminal decline. The manuscript explores the possibility that the central problem of aging may not solely be the accumulation of biological damage, but also the progressive loss of systemic coherence [1][2][3] within highly complex adaptive organisms. We argue that contemporary biomedical research has devoted enormous effort to studying mechanisms of damage while comparatively little attention has been directed toward the mechanisms responsible for maintaining long-term organism-level coordination. This perspective suggests that future longevity medicine may require a broader conceptual framework integrating not only repair technologies, but also the physical and biological principles underlying functional coherence, resilience, and long-term systemic stability.