Why do so many have such a strong need to believe?

Why do so many have such a strong need to believe?

Not necessarily in God, but in other things like the afterlife, reincarnation, aliens, and every other unprovable concept you can think of. Is it just so they don't feel so alone? Is it an ego-boost, a way to feel special? Is it a fear of the oblivion of death? A combination of various factors?

Why do so many have such a strong need to believe?
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