Energy has always been at the core of the transformations which have affected societies. It is the coal which has allowed the industrial revolution and which has offered the possibility to the countries where were located the deposits to developing and to increasing their influence in the world. The 20th century has been, in many considerations, the oil century as much by the huge possibilities it gave as by the crisis it has been at the origin. The access to the Caspian Sea resources had incited Germany to invade the south of Russia, an attempt which has failed in ...