MONEY:
Enhances  speed  of  transaction, 

Obsolesces  barter,

Retrieves  potlatch  (conspicuous  consumption),

Flips when  pushed to its limit becomes credit.

Multi-Media:TheLawsoftheMedia

MarshallMcLuhan;KathrynHutchon;EricMcLuhan

TheEnglishJournal,Vol.67,No.8.(Nov.,1978),pp.92-94.