Doomsday Devices & Ontological Weaponry

Nov 9, 2025

From nuclear nightmares to reality-breaking weapons, we examine how science and fiction imagine the end of everything. What happens when weapons don’t just destroy worlds but unmake reality itself? Explore the science of apocalypse.

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Credits:
Doomsday Devices & Ontological Weaponry
Written, Produced & Narrated by: Isaac Arthur
Editor: Lukas Konecny
Select imagery/video supplied by Getty Images
Music by Epidemic Sound: http://nebula.tv/epidemic & Stellardrone

Chapters
0:00 Intro
1:30 Classical Doomsday Devices
5:57 Cosmic-Scale Doomsday Devices
11:30 Ontological Weaponry – Breaking Reality
12:23 The Erasers of History
16:06 Weapons of Physics Editing
17:55 Mind and Meaning as Targets
20:06 Scavenger Hunt
21:30 Themes and Consequences
22:55 Practical Considerations & Paradoxes
24:07 Doomsday Devices vs. Ontological Weapons
26:48 The Fermi Paradox & Ultimate Destruction