The content originally appeared on: CNN (CNN)Russian President Vladimir Putin has declared the end of 'the era of the unipolar world' in a combative speech that lambasted Western countries at the St. Petersburg International Economic Forum on Friday. 'When they won the Cold War, the US declared themselves God's own representatives on earth, people who have no responsibilities - only interests. They have declared those interests sacred. Now it's one-way traffic, which makes the world unstable,' Putin told the audience. […]