Latin for “it will become” fiat currency is faith-based money that the government has declared to be legal tender, yet is not backed by a physical commodity. The value of fiat money is derived from the relationship between supply and demand rather than the value of the material that the money is made of. Because fiat money is not linked to physical reserves, it risks becoming worthless due to hyperinflation. If people lose faith in a nation's paper currency, like the dollar bill, the money will no longer hold any value.
When the United States closed the gold window in 1971, the world entered a new era in which nearly all money was supported by nothing more than the full faith and credit of the governments issuing it. If one looks back to the history of paper money, no government has had the discipline to maintain its currency without resorting to the printing presses.
Yet the era since 1971 is unique in history in that ALL major currencies are fiat currencies. This is truly the Age of the Fiat Currency - unprecedented in human history.
The inception of fiat currency can best be described by Alan Greenspan in his book Gold and Economic Freedom:
“The abandonment of the gold standard made it possible for the welfare statists to use the banking system as a means to an unlimited expansion of credit. They have created paper reserves in the form of government bonds which – through a complex series of steps – the banks accept in place of tangible assets and treat as if they were an actual deposit, i.e., the equivalent of what was formerly a deposit of gold. The holder of a government bond or of a bank deposit created by paper reserves believes that he has a valid claim on a real asset. Yet the fact is that there are now more claims outstanding than real assets. The law of supply and demand is not to be conned. As the supply of money (of claims) increases relative to the supply of tangible assets in the economy, prices must eventually rise. Thus the earnings saved by the productive members of the society lose value in terms of goods. When the economy’s books are finally balanced, one finds that this loss in value represents the goods purchased by the government for welfare or other purposes with the money proceeds of the government bonds financed by bank credit expansion.
In the absence of the gold standard, there is no way to protect savings from confiscation through inflation. There is no safe store of value. If there were, the government would have to make its holding illegal, as was done in the case of gold. If everyone decided, for example, to convert all his bank deposits to silver or copper or any other good, and thereafter declined to accept checks as payment for goods, bank deposits would lose their purchasing power and government-created bank credit would be worthless as a claim on goods. The financial policy of the welfare state requires that there be no way for the owners of wealth to protect themselves.
This is the shabby secret of the welfare statists’ tirades against gold. Deficit spending is simply a scheme for the “hidden” confiscation of wealth. Gold stands in the way of this insidious process. It stands as a protector of property rights.”
In short – fiat money is a way for the government to have complete control of the economy of their country by printing and distributing their own money.