Why would an observation that may (or may not) apply to bacteria or even to wolves apply to human beings? Because it appears we're also DNA replicators. But,

Why would an observation that may (or may not) apply to bacteria or even to wolves apply to human beings? Because it appears we're also DNA replicators. But, let me play devil's advocate on your behalf, because I like your question. Let's assume that humans do realize their population problems and act to level growth, or reduce it. There's a strong argument that they would also act to reduce their resources, as well. Fewer people means less food necessary to feed the population; So why grow it?