>>69931
>If I trade something worth 5 dollars on the market for something else worth 5 dollars on the market I have not created any more value in the economy. If we are talking about purely market value then trade does not create it.
Well, then we should stop talking about it, because it's nonsense. And also because we didn't talk about it at the beginning: >>69808
>If I trade you 1 peice of gold for one bag of dirt it doesn't matter how much I value that dirt I lose the trade.
Yes, you lost if your goal is to maximize the market value of all your property holdings. But no one in society actually has that goal, or else everyone would forego all kinds of consumption. Also, no one would buy dirt in the first place, by definition, unless he mistakenly believed that dirt somehow had great (market) value.
A trade can be beneficial even though someone "loses out" from the perspective of the homo economicus. Good thing we don't take this perspective, because it is utterly irrelevant to both ethics and economics.