The environment, which is everything on earth, constantly struggles to find the right size for a system.
Sizes that get tried out alternate between being larger and smaller than today’s models.
A set of parts that must work together as conditions change. Examples of a system are a live animal, a corporation, an agency, a city and a fuel supply chain.
Nature evolved dinosaurs. The pterosaur, a flying relative of dinosaurs, had a wingspan of 18 meters (60 ft.). By contrast, the wingspan of the World War II British Spitfire aircraft was a mere 11 meters.