B ALANCE OF P OWER
A. E. Campbell and
Richard Dean Burns
The balance of power appears at first sight a simple concept. It has been defined as "a phrase in international law for such a 'just equilibrium' between the members of the family of nations as should prevent any one of them from becoming sufficiently strong to enforce its will upon the rest." Yet the phrase has always been of more use in political polemic than in political analysis. Like other phrases with a strong emotional appeal it is vague, and it would lose its appeal if it were more precise. Its obscurities are several, but the most important is that it blends the descriptive and the normative. The condition is one, the term "balance" implies, toward which international life is forever tending. That is the descriptive element. But the condition is also one that may be upset, and right-thinking statesmen should constantly be on the alert to preserve or restore it. That is the normative element. These two elements reinforce one another. Because such a balance will be established in any event, it is sensible and moral to work toward it. Because people work toward it, it will be more readily established. Difficulties arise if either element is weakened. At what point is it right to abandon an old balance and accept a new one? Can a balance exist if people are unconscious of the need to maintain it?
Behind all the interpretations of the balance of power lies the appeal to realism in the conduct of international affairs. Realism remains the best, perhaps the only persuasive, argument for restraint; and it is common ground that the doctrine of the balance of power is a device to promote restraint, whether it is argued that lack of restraint is wrong, or dangerous, or ultimately bound to fail. In that sense the balance of power in international affairs is clearly related to the idea of checks and balances within a government, which is equally a device to impose restraint on men who might otherwise, seduced by power, abandon it.
See also A LLIANCES , C OALITIONS, AND E NTENTES ; C OLD W AR E VOLUTION AND I NTERPRETATIONS ; C OLD W AR O RIGINS ; C OLD W AR T ERMINATION ; C OLLECTIVE S ECURITY ; P OST –C OLD W AR P OLICY ; P ROTECTORATES AND S PHERES OF I NFLUENCE .