Introduction

Money is one of he most brilliant human inventions in history.  It can also be seen as the source of evil, because it leads to inequality, exploitation, and alienation. It took centuries to develop the current forms of money, and it continues to evolve, in an age of rapidly increasing international commerce and global travel. The concept of money raises many questions related to justice: 

The Functions of Money

Money fulfills three specific functions: 

1. The medium of exchange means that money can be traded for everything. it is the most liquid form of exchange medium. 

2. A store of value means that money can be held for a time without losing its purchasing power. 

3. The unit of account means that the price of different items is measured with the units of money; thus, money is a yardstick of value across the economy.Money avoids the need for barter, which is an inefficient way of organizing exchange in the economy.  Barter also requires a double coincidence of wants.  (I need to want what you have, and vice versa.) Money helps the economy to function more smoothly.

In addition to these three functions, money can also be seen as a market information system. Since the price is only a function of the relation between supply and demand, it gives you information about this relationship and how it develops and changes. This is valuable information for the prediction of future events, and we see how this market information system blossoms into markets for stocks, futures, or options.  


The Forms of Money

What exactly qualifies as money? Economists use three definitions, which build upon each other - M0, M1, M2, and M3.  

The currency for a country gets issued by the Central Bank. Paper money is like the money in a casino, except that in the case of a country's currency, the value is backed up by the reserve banks. The gold standard was in effect until 1971, and it tied the money supply to the gold reserves owned by the US government. THis system became impractical when the US had to borrow large amounts of money, and when the dollar became the de facto currency for the world. Recently, there have been attempts to create money independent from any governmental institution, see bitcoins

Bitcoin is a form of currency based on blockchain technology. It circumvents government control, and does not require trust between the parties. The technology is revolutionary:“ It is a peer-to-peer system of payments independent of financial institutions.  Here is the original paper by Satochi Nakamoto from 2008 that describes the approach. 

The image above shows a Yap stone at the village of Gachpar on Yap, a Micronesian island. This stone serves as money. It never changes location, it just gets used as reference for who owes what to whom. Money needs to keep a constant value, so that the equation x costs y does not change too much over time.  

Money and Value

The different forms of money demonstrate that it functions as a symbolic system that can be supported by many physical objects.  almost anything can take the place of the actual currency - sea shells, precious metals, stones, animals, etc.  History shows that even humans can be used as currency, in the form of slaves. 

One of the goals for the money supply regulators is stability. If they value of the currency fluctuates, there is inflation or deflation, which makes economic planning much more difficult. 

Because money is itself some kind of object with value, it can also be bought and sold, and the outcome are money markets. Prices for money are measured in interest rates.  

In the past, this stability of money was controlled by the so-called "gold standard." If governments agree that the total value of a country's currency should be backed by gold, the government cannot willfully create more money in order to finance itself. This gold standard ended with  Nixon in 1971, because he had to finance the Vietnam war.  Since then, the value of a currency simply depends on the Government's will to keep the value stable.  This is not just important in order to avoid inflationary or deflationary pressures, but also for international relations.  Governments can experience capital flight, when nobody wants to buy the currency and thus the value plunges. This would make it harder for the citizens of this country to travel abroad. 

Questions to consider