Currency money or book money, which are fiat money. Currency money Currency money is money in full circulation that takes its value from the precious metal it contains, that is, its market value is (almost) the value of the metal it contains (apart from the Seigniorage or the minters' profit), though this is always overcompensated for in coins and banknotes from a country undergoing debasement. Currency money is usually made of silver or gold, but in very rare cases plated metal and even copper may be used. Currency money is commodity money, as opposed to coins whose metal value is less than
Evolution (term) Evolution (term) The English noun evolution (from Latin "unfolding, unrolling") refers to any kind of accumulation of change, or gradual directional change. It is the 3,117th most commonly used word in English. While the term primarily refers to biological evolution, there are various types of chemical evolution and it is also found in economics, historical linguistics, and many other technical fields where systems develop or change gradually over time, e.g. stellar evolution, cultural evolution, the evolution of an idea, metaphysical evolution, spiritual evolution, etc. The English term prior to the late 19th century was confined to referring to goal-directed, pre-programmed