You can't prove a negative (parody)

[Anomalocaris]

This maybe be true, I wish I knew. But the question is, if it was false, would we be fools to believe in it? Would we be believing in false wisdom? Would we be pathetic for wishful thinking it is true?

Does evolution favour beliefs that are true all the time, or does it favour beliefs that work and benefit humanity?

Our concept of identity, we work better with it. Belief in free-will, we function with it. The human experience is what it is.

The answer to whether evolution favors beliefs that are true is very evidently variable according to the time and circumstances.

For beliefs that are true to be favored, it must increase the proficiency of the believer in forecasting the consequences of his actions.

For beliefs that are true to actually increase the proficiency of the believer in forecasting the consequences of his actions, the belief must be pragmatically actionable.

In primitive societies with crudely developed means, the capacity to act on any belief is very limited, and means to arrive at true belief, and discern it from other untrue beliefs, are even more limited. In this environment, very few true beliefs can be recognized as such, or can be acted upon with available means. So in this case true beliefs would be of limited utility. Having a few false beliefs that happen to promote certain crude rules of thumbs that happen to provide survival advantage is just as good, since crudeness pervades all available means.

In more advanced societies with refined means, the capacity to act on beliefs have greatly expanded, and means to tell true belief from false have also matured. In this circumstances, many true beliefs can be recognized as such, and can be acted upon with precision. So here true beliefs would be of greatly expanded value in producing forecasts to guide one's actions. Having a few false beliefs that might promote certain crude rules of thumb would comparatively be far inferior in survival value next to refined precision with which true beliefs can be acted upon and can be used to bring about carefully calculated favorable results.

So the answer to your question is, You might have been a small fool, hardly more foolish than the majority of other people, to believe in things that are reasonable detectable as untrue 2000 years ago. You would have become an increasingly big fool, drifting decidedly towards and then below the human average,for believing the things that are reasonable discernable as false as years ticked from 2000 years ago towards the present, and you would be a monsterous fool for continuing to believe demonstratably false things into the future.