Nineteenth century economist Carl Menger[M1892] first described how money evolves naturally and inevitably from a sufficient volume of commodity barter. In modern economic terms the story is similar to Menger's. Barter requires a coincidence of interests. Alice grows some pecans and wants some apples; Bob grows apples and want some pecans. They just happen to have their orchards near each other, and Alice just happens to trust Bob enough to wait between pecan harvest time and apple harvest time. Assuming all these conditions are met, barter works pretty well. But if Alice was growing oranges, even if Bob wanted oranges as well as pecans, they'd be out of luck – oranges and apples don 't both grow well in the same climate. If Alice and Bob didn't trust each other, and couldn't find a third party to be a middleman[L94] or enforce a contract, they'd also be out of luck.
yeah sorry you've lost credibility.