---
title: "Shallow Eternity vs. Deep Time"
description: "Moynihan's central distinction."
type: "glossary-term"
canonical_url: "https://antikythera.wiki/terms/shallow-eternity-vs-deep-time"
md_url: "https://antikythera.wiki/md/terms/shallow-eternity-vs-deep-time"
last_updated: "2026-09-06"
site: "Antikythera Wiki"
---

# Shallow Eternity vs. Deep Time

> A working definition written for this wiki from the reading notes; not Antikythera's own wording. From Antikythera Wiki (https://antikythera.wiki/terms/shallow-eternity-vs-deep-time), an independent guide to Antikythera's published work.

Moynihan's central distinction. Eternity is boundless and therefore unmeasurable and *flat*: every possibility recurs, nothing is irreversibly lost or gained, legacies are orbits, and no "now" can be located (Aristotle: we also come *before* our ancestors). Deep time is enormous *but bounded* — "depth is, by definition, measurable and bounded" — and is the only kind of time in which decisions are consequential, because not every possible outcome will come to pass regardless. The historical pattern he tracks is eternity's *recurrence* (Aristotle → Hutton/Lyell → Hoyle's steady state) whenever a newly enlarged magnitude is mistaken for infinity, and its successive defeat by fossils, thermodynamics, radium and the CMB. Not the same as long-termism's legible future (Konior's critique).

## Appears in

- [Existential Technologies](https://antikythera.wiki/work/journal/existentialtech) (2025-05-10)
- [The History of Now](https://antikythera.wiki/work/journal/historyofnow) (2025-05-10)

_Glossary generated 2026-09-06._