Barter and De-humanization

The purpose of simple Barter is for each party to exchange what they have  in excess for what they need.  Thus, each has the expectation of an equitable exchange, or, conversely, a disappointment of that expectation would be the end of the practice.  Hence, Equitable Exchange is a fundamental normative principle of Barter.  Furthermore, as a result of an Equitable Exchange, each party has the same quantity of goods as at the outset, except now there is qualitative diversification in their possessions.  So, there has been an increase in the diversification of the Wealth of each, but no quantitative change in the total Wealth between them.  Hence, Smith's principle of an increase in one's personal Wealth, and his goal of an increase in total Wealth, stray significantly from the practice that he characterizes as the unique Human property.  Thus, it is not inappropriate to accordingly characterize that straying as 'de-humanization', i. e. the corruption of Need into Greed.