How has the world changed since the fall of Saddam Hussein ten years ago? What effect did the war have on the balance of power, the respect for international institutions and the global standing of the United States and Britain? George W. Bush described the war as 'a central commitment in the war on terror' but some say that, if anything, it has promoted terrorists and their cause. And then there's liberal interventionism. Have we created a tyrant's charter? Leading thinkers from Britain, the United States, China and Russia discuss the impact of the war that has dominated our headlines and reshaped our history.