As an evolutionary biologist I am fascinated by the emergence of that suite of cognitive abilities that make us so distinctive from other living species.
There are, however, risks in making up evolutionary "just-so" stories to explain the origins of complex human beliefs, such as religious ones.
For we have virtually no firm knowledge of the details of religious beliefs prior to the invention of writing about 5,000 years ago. Some general (and plausible) inferences can be made based on burial customs, cave paintings, and the like, going back a few tens of thousands of years, but before that the discussion becomes increasingly speculative.
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