There was a society that was extraordinarily gifted in making things. Most people created what they needed themselves. Some of them developed the ability to make certain things much better than others could make the same items. Over time, they not only could make them better, but also could make them faster and cheaper, even at scale.
While this was quite the accomplishment, the problem was that these producers began to have their warehouses filled with their goods. Creative members of this group found ways to tell large number of people about their wares, and how if folks would buy their products instead of making the items themselves, they would save time and have better products.
All of these ideas caught on. The people began to specialize in what they produced best, and sold them to each other in order to buy others’ products. Life got easier.
As people grew to enjoy consuming each others’ products, a dynamic equilibrium was approached between production and consumption. However, as people learned to consume ready-made items, they became interested in newer and more types of products, which increased demand for new producers. So growth occurred instead of reaching equilibrium. This was good.