History of money I

Money. Somebody recently wrote that he had a love affair with money but that it was an unrequited love. That about sums up my relationship with money. In other words, me and money are not on intimate terms. If money is a dame she's a high maintenance gal to whom I don't pay enough attention. Truthfully, I don't love her enough and in return she declines to honour me with her favors. In other words I have been spared, as O Henry put it, "those ills attendant on superfluous wealth." In still further words, I am not exactly an authority on money.
I hope the old gal won't be too insulted if I poke around in her private parts for a few posts.
Maybe I'll start out with a nutshell history of money. Money is essentially a medium for storing and distributing wealth. Itinerant pre-agricultural societies could accumulate no more wealth than what they could carry but wherever settled agriculture established itself seed grain had to be set aside from the present harvest and saved or there would be no more harvests. The very fact that grain is relatively imperishable compared to most other foods is one of the main reasons civilized society succeeded and grew wealthy. So it's entirely fair to say that farmers were the first capitalists, their stored grain being the first form of capital. But money hadn't been invented yet, so a way was needed to organize the distribution of capital, and the ancient temple priests took on that task. They learned writing to keep track of who owed what to whom, they learned arithmetic to calculate how much, they learned geometry to resolve disputes over land ownership, they learned how to build cities and grain storage facilities, and they organized armies to protect themselves from people who would take it away. Evidence seems to point to Mesopotamia as the area where this sudden change in human destiny occurred, and it was not long afterward that war between Mesopotamia (present day Iraq) and the nomads of the plateaus and mountains to the east (present day Iran) began.
I say suddenly, because all these developments, writing, cities, a priestly class of scribes, settled agriculture, arithmetic, were invented within a few generations and the world has never been the same since.
But they didn't invent money and this was a handicap. Then as now gold, silver, jewels, and other things humans covet represented value, and they were used as standards of value by which the relative worth of other forms of wealth could be measured but it was a cumbersome system. Nevertheless, it took another 3000 years before somebody in the kingdom of Lydia in Asia Minor got the bright idea of issuing disks of gold and silver, of standardized units of size and weight, stamped on each side with images of kings and deities as symbols of trust.
This was another monumental change in human affairs. All of a sudden a man's wealth could be stated in terms of how many of these disks were in his possession, regardless of how he had come by his wealth.
A few words here about gold and silver. It's commonly thought that these metals are intrinsically valuable. They are not. They are useless. They can't be eaten, they are too soft to be made into tools or utensils, and gold is too heavy to carry around. However, gold and silver are shiny and people like shiny things. They are rare, which arouses innate human covetousness. "Aha, I have one and you don't." And they don't (especially gold) deteriorate over time. These are the qualities that make those metals ideal for use as a currency.
Is it an accident that Greek and Roman dominance of the Mediterranean world coincided with the adoption of coined money or is it a consequence? I don't mean to minimize the importance of Greek ideas and culture or Roman engineering and military genius, but how far would it have gotten without the enormous increase in trade and commerce made possible by coined money?