Dr. Rood’s special interest, within the rubrics of history and military history, was the growth of empires. He had intimate knowledge of the wars of German unification, and the two world wars, and Berlin’s parts in them. The expansion of Russia, succeeded by the expansion of the Union of Soviet Socialist Republics and the Warsaw Pact and its overseas alliances, absorbed him emotionally and intellectually.
Becoming the world's only superpower can cause strange dreams. In the case of the United States, which achieved this status over 20 years ago, many who should know better have dreamed that economic interdependence, multilateral institutions, technological change, global democratization, the rise of non-state actors—even Barack Obama's charming personality—will have a transformational effect on world affairs, rendering irrelevant the geopolitics underlying American national security. But geopolitical competition between major world powers obviously continues, and these dreams, which are recognizably liberal dreams, remain delusive and dangerous.