The very strong passed and announced price increases of the fossil energies and of power remind us a time we thought it was bygone, with the oil prices shocks of the Seventies. The Middle-East and African countries oil producers did gather in 1960 to create OPEC in order to counterbalance oil majors full power. In 1973 the organization decided to limit its production and ordered an embargo against the United States and the Low Countries as the consequence of the Kippur war. The barrel price jumped from 3 to 12 dollars. A new disequilibrium occurred on the market four years ...