Except prior to artificial light sources, you would still be forced to stay sheltered or spend your time huddled up with weapons at the ready.
> and you get twice as much working time per day.
Until our work consisted of something other than hunting and gathering this would likely not have been all that much of a benefit.
On evolutionary timescales it would seem most of our evolution has happened in conditions where we were severely constrained with respect to what we could safely do during the night anyway, and so there'd be relatively little benefit to working around whatever the problems of avoiding sleep are.
I don't doubt that cutting sleep will pose all kinds of challenges we're not even aware of yet, though.
Except prior to artificial light sources, you would still be forced to stay sheltered or spend your time huddled up with weapons at the ready.
> and you get twice as much working time per day.
Until our work consisted of something other than hunting and gathering this would likely not have been all that much of a benefit.
On evolutionary timescales it would seem most of our evolution has happened in conditions where we were severely constrained with respect to what we could safely do during the night anyway, and so there'd be relatively little benefit to working around whatever the problems of avoiding sleep are.
I don't doubt that cutting sleep will pose all kinds of challenges we're not even aware of yet, though.