>And that pinpoints one of the problems I have with the
>LIGHTS OUT book:  sometimes I think their basic premises are
>a bit shaky.  They say we should be going to sleep at
>sundown, and only the advent of fire is what has made us
>change this.  I find this a bit difficult to swallow whole.
>While some things may have been more challenging after dark
>without a light, it is hard for me to agree that this made
>these things totally "undoable."

I agree with you, it does seem a bit far-fetched, considering our
adventurous nature.  But, if you take into account that they weren't all
that bright, I can imagine that paleo man may have been more scared or
superstitious about going out into the night and preferred to stay inside
the cave instead (especially if they had no fire to help protect them from
predators).