Money n. pl. monˇeys or monˇies - A medium that can be exchanged for goods and services and is used as a measure of their values on the market, including among its forms a commodity such as gold, an officially issued coin or note
 
Money dates back thousands of years and is derived directly from primitive hunter gather societies and systems of bartering. At one time, man most likely traded one thing for an entirely different thing they saw as having equal value. A certain number head of livestock could buy other things you might need, even a wife. The two parties had to agree to the equal value, surely standards of valuation for bartering arose.

This tendency for men to barter and trade allowed people to specialize on one endeavor (farming, hunting, building) and trade those goods and services for other goods and service they may need. Anything that is of value to many can be used as a type of money or a system of valuation, and has. Salt, tobacco, livestock, and fur are a few examples of goods commonly used as a medium of exchange and valuation. Money and trade became a valuable and indispensable tool in the development of civilization.

As civilization grew the system became more complex and standardized. Soon humans looked for more representational ways to trade. They looked for a standard medium they could use to represent value. Anything a person wants or needs must be able to be valued in this medium. Instead of directly trading goods and services, people could now receive objects of stated worth for their goods and services and in turn trade them for goods and services they need, and so on. This created an economy and allowed people to concentrate on highly specialized tasks in trade for this medium and use it to buy what they need from merchants, who can in turn use it to buy more inventory which allows the person who produces the goods to buy what he needs and keep producing it. Many things have been used as money in this way but the use of metal (especially specific precious metals such as gold) eventually became a universal standard.

The rise of metallurgy and mining, an increasingly complex society and system of government and  the simple touchstone (a method of rubbing stone and testing the purity of soft metals) paved the way for a monetary system based on gold that immerged from Asia Minor thousands of years ago and was embraced by almost every society on earth. Eventually a whole spectrum of metals would be used.

In this system gold and other precious metals act as a standard to calculate worth. Thus all goods are given a value as it relates to a standardized value of gold. Other metals such as bronze, copper, even iron were used. Because the metal was of a lower value so in turn was the coin worth less, the smaller the coin the lesser its worth relative to the metal content.

It can be tedious paying for everything you need in numerous heavy coinage thus governments and businesses began creating promissory notes and the advent of printing made it simple to move from hefty sacks of coins to relatively light stacks of paper. Eventually the gold standard was dropped and moved to a system of Fiat money.

Fiat Money is money NOT backed by commodity reserves but on decree. Fiat in Latin means "Let it be done". The money is issued on the authority of the government and they say what it is worth. A dollar or a pound no longer represents reserves of precious metals and other things of value. A dollar, pound, franc or lire is worth what any given society, governing bodies, international financial committees say it is worth in relation to goods it can purchase.

At one time fiat money was used by societies that were in crisis and could not back the notes and coins it produced. The United States eventually switched to fiat money in 1971. Because much international currency was fixed to the dollar this event meant that most other nations would also switch to this standard.

Many governments will still issue coins made of gold or silver in many denominations but because of the precious metals it is made of, a gold or silver pound or dollar is worth far more than a dollar issued for circulation. Very little silver and no gold is used in commerce today. Most money is either printed on paper or minted using alloys of lesser metals like copper and nickel. Any silver coin in circulation today are older coins that have yet to be found by a collector.

Coins are collected by people for many reasons. The precious metal content, the artwork, the country who issues it, the person who created it, the politics behind it, and the history. Through time old coins are retired and new coins are released. They become historical objects and their value will over become far more than the value stated on the coin.

The history of money and trade is a history of human civilization.

 

MONETARY HISTORY RESOURCE

 
History of Money on About.com : A Basic overview of the history of money with articles and links to more in depth information.
History of Money from Ancient Times to Modern : A very thorough study of money from the dawn of civilization to modern times.
History of Money at Wikipedia : A great general resource that also carries a wealth of information about money.
More About Money : More about money at Wikipedia.
'Money: A History' at Amazon.com : delightful, profusely illustrated, compact history of money.
Common Metals used in Coins : A list of metals commonly used in coins today and through the ages.
Coins and History of Asia : A great sight devoted to the coins of Asia.
History and the US Gold Coins :  A site devoted to the history of the gold coins with tips for the collector.
For Beginners : Great place to start if you are thinking of collecting coins, lots of good advice and some hints and tips.
History of Money Learning Resource : Money Instructor is a great education sight concerning money and it prominent place in society and history.