False vacuum theory
The false vacuum theory originates from quantum field theory, in which a false vacuum is a vacuum that is in a stable state but isn’t permanently stable: it is metastable. This false vacuum could at any moment decay to a permanently stable vacuum. The false vacuum theory states that our universe is currently in the false vacuum, which may at any time revert to a stable state. This would cause the true vacuum to form and expand rapidly at a speed of light, which would prompt colossal changes to our universe: the laws of physics would be rewritten anew and the basic structure of matter would change completely. In 1980 another theory was proposed, stating that in a case of a true vacuum rapidly forming, our universe would simply revert to its state before the Big Bang, and simply be deleted, as if it never existed.
Links: https://cosmosmagazine.com/science/physics/vacuum-decay-the-ultimate-catastrophe/
I guess this theory was created with the aim of fuelling fear and uncertainty. Frightened people are easier to manipulate. It clearly failed though as most people probably haven't heard about it.
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