> So your recommendation is that each and every one of
> us has just as many children as we possibly can.

I made no recommendation.

> In biological systems, species either have some species-imposed
> limits on their numbers (one offspring every two years, fledglings hatched
> several days apart so in lean years the latecomers die, etc. etc.), or
> the ecosystem imposes limits on them (such as boom-bust cycles of rabbits
> or lemmings).

But none of them refuse to breed when they have the opportunity. So why should
early humans have been any different ? The idea that early humans had an
average of only one child each over the course of a lifetime is laughable,
and would have been a short-cut to extinction.