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2. Early civilizations bartered goods directly - trading
livestock, grains, and any number of items or used
a set of these items as common currencies to be
traded around.
Cowry shells made from sea snails were used by
ancient civilizations in China, Africa and India.
Electrum (alloy of gold and silver) coins were used
by the Greeks and empires of the time.
Gold and silver were used by many European
nations and their colonies.
Paper money is the dominant form of physical
currency today.