I believe that the existing power structures in Europe and Northeast Asia are not sustainable through 2020.

Offensive realism predicts that the United States will send its army across the Atlantic when there is a potential hegemon in Europe that the local great powers cannot contain by themselves.

The liberal tradition has its roots in the Enlightenment, that period in the eighteenth-century Europe when intellectuals and political leaders had a powerful sense that reason could be employed to make the world a better place.

The Soviet Union and its empire disappeared in large part because its smokestack economy could no longer keep up with the technological progress of the world's major economic powers.

Important benefits often accrue to states that behave in an unexpected way.

In the 1930s, Adolf Hitler believed that his great-power rivals would be easy to exploit and isolate because each had little interest in fighting Germany and instead was determined to get someone else to assume the burden. He guessed right.

The most dangerous states in the international system are continental powers with large armies.