> Who said anything about wealth? That sounds like a red herring to me. In any ecosystem, with any living organism, a population will increase until it reaches the limit of its food supply.

Empricially incorrect with humans, largely because human reproductive behavior isn't purely instinct driven and involves conscious choice based on lifestyle concerns, which is why natural population growth consistently declines with I creasing strength of social support systems. The distributional failures which are the only reason for world hunger despite far more than sufficient production to neat global needs also contributes to population growth by making children and family the social support structure in much of the world.