Global · Politics & Governance · Great Power Geopolitics
Claim: Cobalt Doomsday Bomb Is Already Possible
Explainer: a cobalt "doomsday bomb" is technically feasible, held back only by choice
Summary
A video traces nuclear weapons escalation from fission to fusion to the theoretical cobalt "doomsday bomb," arguing fallout rather than blast would be its purpose, and that the technology already exists and is withheld only by choice.
What it argues
- Fusion breaks the yield ceilingPolitics
Early fission bombs maxed around 500 kilotons because blast pressure cut the chain reaction short, the video says. Fusion removed that limit, letting yields pass 50 megatons, as with the Soviet Tsar Bomba test. Fusion technology erased the physical ceiling on nuclear destructive power.
- Cobalt bomb mechanismPolitics
A three-stage weapon wraps fusion fuel in natural uranium for extra yield but heavier fallout, the video explains. Replacing that tamper with cobalt-59 turns fusion neutrons into radioactive cobalt-60, making fallout the weapon's purpose. The design makes radioactive contamination, not blast, the actual weapon.
- Scale of global contaminationPolitics
Cobalt-60 fallout needs about 125 years to decay to a safe level, the video says. It calculates roughly 510 tons of cobalt could theoretically blanket the Earth's entire surface in lethal fallout. A relatively small amount of material could render the planet uninhabitable for generations.
- Doomsday logic and restraintPolitics
The video argues such a weapon aims not to win territory but to make it uninhabitable, leaving no victors or enemies. It states the physics, materials and delivery systems already exist; only a collective choice not to build one prevents it. The video frames a cobalt bomb as technically feasible now, held back only by restraint.
Key points
- Fusion weapons removed fission's yield ceiling, enabling yields past 50 megatons.
- A cobalt-59 tamper absorbs fusion neutrons and becomes radioactive cobalt-60 fallout.
- Cobalt-60 fallout needs about 125 years to decay to a safe level.
- Roughly 510 tons of cobalt could theoretically contaminate the Earth's entire surface.
- The video says the technology already exists; only collective choice prevents it being built.
Open questions
- Whether a cobalt bomb has ever been built, tested or possessed by any country.
- Who, if anyone, currently has the capability or intent to build one.
- What, besides choice, has historically prevented such a device from being built.
Sources
- Video: Escalation of Destruction — justicecouncil.org
