The economic gravity of the world is shifting radically. In the 19th and early 20th century the centre of gravity was mid-Atlantic. Now, it is shifting rapidly to the East. The world is becoming more multipolar and with this new interests are emerging- challenging the dominance of Western power. As the old power structures weaken and break up, there is a great danger that there is no longer a force or a legitimate authority capable of upholding the rules of international order. In this lecture Danny Quah will elaborate these themes and explore the implications for leading states. He will also raise a difficult question of whether the world order requires a hegemonic power.