Mankind’s woes all come from unpredictability.
We learn to predict at the best.
Throughout their life Men might not have will, nor strength, to predict and be objective. This is indeed a difficult task; and often it might even not take you anywhere, because you are looking in the wrong direction; you are too stupid.
Then one can resort to believing; be it religion, be it the horoscope, be it your dead grandmother, be it your garden tree you hug daily.
It is, in the end, this that differentiates men: for how long, and under which pressure, will they give up or hold out their beliefs/wishes?
Nota bene: it is never known in advance whether it is the believer, or the skeptic, or both, who will survive in a determinate situation; otherwise we would all be either skeptics or believers.