Actually, humans and animals have built-in brakes (predefined adult size modulated epigenetically, à lower fertility rate when the food is scarce). Ecosystems

Actually, humans and animals have built-in brakes (predefined adult size modulated epigenetically, à lower fertility rate when the food is scarce). 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.