Published online by Cambridge University Press: 04 July 2003
Russia is by some measures the most successful imperial enterprise in history. Surpassed in size only by the British and Mongol empires, Russia and its Soviet successor proved far more durable than either one. It retained its peak territorial extent longer than any other empire, and for most of the last 400 years it has been the largest polity on earth. Moreover, both St. Petersburg and Moscow were hugely successful as great powers, playing major roles in European and world politics for the three centuries after 1700. And their influence as great powers peaked in the nineteenth and twentieth centuries—an era in which states based on nations appeared to have the competitive edge over old-fashioned polyglot empires.