Do you remember how a series of crazy coincidences and freak accidents kept preventing the LHC from being turned on? What if the LHC was causing world-ending or life-ending events, and we simply kept surviving only in thinner and thinner slices of amplitude (timelines) where those freak accidents happened, but where also more improbable world conditions took place?

There’s an SCP story like that.

World only survives, in realities where this particular creature in containment is alive. I’ll see if I can dig it up.