Antonyms of "meliorism"

What are the near antonyms of meliorism?

I think the antonym will oppose the belief that the world can be made better by human effort. It can be a disbelief in efforts or humanity, despondency of some sort and likewise.

Is there a word suitable as an antonym to meliorism?

Solution 1:

Optimism, meliorism, pejorism, and pessimism are from Latin optimus, melior, peior, and pessimus, respectively, meaning "best", "better", "worse", and "worst".

From that grouping, the closest antonym is pejorism (meaning "the belief that the world is becoming worse"), but the more-familiar pessimism will probably suffice for most purposes.