Breathing the Lineage / Respirar el Linaje

Ancestral Transhumanism II argued that continuity of identity through a change of substrate is possible only where memory and process are not separable. That paper concerned the continuity of mind; this one concerns the continuity of body. If transhumanism's ambition extends to the flesh, redesigning respiration and the molecular base of life for environments the human body was never made for, it faces a parallel question: can the body be transfigured without severing the thread that makes it this lineage rather than a replacement that merely works? We argue that the answer turns on a distinction between two ways of redesigning: recovery, in which new function is read out of life's accumulated structural memory before it is written, and overwriting, in which it is specified against that memory. Three lines of evidence support the criterion: copper-based oxygen transport arose independently in two animal lineages from distinct ancestral copper enzymes; the coldest-living of those lineages met extreme cold by modulating its inherited carrier rather than replacing it; and de novo protein design, recognized by the 2024 Nobel Prize in Chemistry, writes new function within a structural grammar learned from life's catalogue of solved structures. Evolve without forgetting is restated for the body: not as preservation, but as recovery. Bilingual edition: English (primary) · Español (cuerpo menor). Single record, single DOI. Ancestral Transhumanism (TA) Working Paper III.