I found it !

The English text of John Gray's article :

"A shattering moment in America's fall from power. The global financial crisis will see the US falter in the same way the Soviet Union did when the Berlin Wall came down. The era of American dominance is over."

"Our gaze might be on the markets melting down, but the upheaval we are experiencing is more than a financial crisis, however large. Here is a historic geopolitical shift, in which the balance of power in the world is being altered irrevocably. The era of American global leadership, reaching back to the Second World War, is over."

See : http://www.guardian.co.uk/commentisfree/2008/sep/28/usforeignpolicy.useconomicgrowth.