Subparticles are not just bits of stuff, but ripples of energy which combine to form the illusion of substance, just as wind forms ripples on a lake or sunshine in raindrops reveals a rainbow. Atoms, molecules, living cells are formed out of the ever more complex interchanging energy patterns. This interchange takes on more complex and wonderful forms in the plant and animal worlds. The interplay of evolution, eliminating the superfluous like a sculptor, creates humans - who continue the exchange process again on more complex, subtle levels. Females may not be constant measures of desirability and cows cannot be kept long or carried far.
More forests are cut down for pasture, more pasturelands turn into deserts.
With agriculture came the need to measure value through time more accurately. The dummy clay sack represents the real sack of wheat the hand will get. But clay dummies are easily copied. What is needed is a system of tokens whose supply cannot be so easily manipulated. It is necessary to invent the value of gold and silver.