The article discusses different theories about how companies make money. At first, people thought companies were run by one person trying to make as much profit as possible. But as companies got bigger and more complicated, new theories had to be developed. Some theories say companies are always trying to balance different factors to make the most money. Others say companies are always changing and can't be predicted. These new ideas help us understand how companies work in the real world, and how efficient they are compared to a perfect system.