"But here's the key point: even a failed venture creates at least some value. Something new is brought into the world, something that did not exist before. The failed venture added some value to the market, even if that value was not enough to satisfy the need for profit (and may not even have offset the costs of the inputs). It is up to the producer to set a minimum bar for profitability."
This is a great essay about Say's Law and the market economy. Here is the link.
