Relativity reframes immortality as coexistence

Interpreting special relativity’s block‑universe and time‑dilation effects suggests that different temporal slices of a person all ‘exist’ in a tenseless sense, so 'immortality' can be framed as the physical coexistence of one’s moments rather than indefinite biological survival. This is not a practical path to living forever, but a conceptual shift that treats future and past selves as ontologically on par with the present self. — That reframing alters how public debates talk about death, life‑extension, cryonics, and moral responsibility toward future selves by moving some arguments from metaphysics into physics‑informed rhetoric.