> Every mammal on this planet instinctively develops a natural equilibrium with their surrounding environment, but you humans do not. You move to another area, and you multiply, and you multiply, until every natural resource is consumed. The only way you can survive is to spread to another area.
No areas left.
All the mammals (and other animals) multiply as much as they can, only not having enough to eat, or another species eating them can stop that. In most cases populations fluctuate around some equilibrium, but that's caused by dying off in other cases, not by some instinctive virtue.
Humans multiply because they can increase the amount of available resource with technology, not by moving to new area.
Ecosystems tend to evolve up to a point where the sun’s energy is optimally tapped.
Species that are too agressive tend to die out or evolve into a milder form.
Agreed for the second part of the quote.