
Source: Understanding International Conflicts: An Introduction to Theory and History (6th ed., 2006), Chapter 1, Is There an Enduring Logic of Conflict in World Politics?, p. 2.
Context: The world at the beginning of the twenty-first century is a strange cocktail of continuity and change. Some aspects of international politics have not changed since Thucydides. There is a certain logic of hostility, a dilemma about security that goes with interstate politics. Alliances, balance of power, and choices in in policy between war and compromise have remained similar over the millennia.