Such as that when societies become more affluent their
birth rates often drop - this has recently happened in
Thailand and pretty dramatically in Brazil, for example.
OTOH - when you get a situation like Nigeria or Pakistan
where there is a mostly poor population that is expanding
rapidly and is already at or greater than capacity for food
production, clean water, etc. the idea that overpopulation
is a myth is not even close to in touch with reality.
In Pakistan, thirty percent of children under five years of
age are malnourished now, and the population is predicted
to double in a little over thirty years.
It's pretty much a disaster now, what do you think it's going to
look like if they continue on the same trajectory?