Gazprom, an industrial and financial conglomerate created in 1992, is the key weapon in the Kremlin's geopolitical strategy. First producer of natural gas, Russia indeed holds a third of the world's total reserves. Responsible for producing, distributing and selling it, Gazprom is a company like no other, where gas market professionals work, but also ministers, deputies and advisers close to the Russian president. It was during the winter of 2005-2006 that Europe, which buys 30% of its gas from Russia, suddenly became aware of its vulnerability. Comment ? Overnight, Russia had just cut gas supplies to the pro-Western Ukraine of Viktor Lushchenko, who refused to pay tariffs multiplied by five. Since then, the continuous rise in oil prices, coupled with ever-increasing Chinese demand, has confirmed the key role that its hydrocarbons give to Russia. Resources over which Putin and his entourage were able to regain full control and boost their exploitation. The World According to Gazprom is a unique and exclusive guided tour of a growing empire.