Intense psychological problems result in ideologies that prophesize "the end of the world as we know it" to minimize the cognitive dissonance between said problems and the relatively tranquil/happy/prosperous society we live in.
nonsense. everything may appear tranquil from our post in the West, but vast swaths of the World live in squalor and violence. this is not mere coincidence: we in the West live in relative tranquility
precisely because much of the world lives in squalor and violence. such a situation can't last for long on the evolutionary-clock.
p.s. psychological illness is a social construction.