International Subsystems: Stability and Polarity

One of the current controversies within international relations deals with the “stability” of bipolar as opposed to multipolar stratifications of world power. Morton Kaplan, in codifying the views of classical balance of power theorists, advances the view that multipolar systems are more stable than bipolar systems. Kenneth Waltz, sagely pointing to the relatively peaceful international arena since World War II, argues that a bipolar distribution of power can guarantee world stability. Many a priori arguments have been presented to buttress the Kaplan and Waltz hypotheses. In one of the most elaborate such formulations, the “interaction opportunity” hypothesis of Karl Deutsch and J. David Singer, the presence of stabilizing crosscutting alliances is postulated to be most likely within multipolar systems, which in turn are a function of the number of major powers and members of a system. In an attempt to bring the two opposing strands of theory into a larger framework, Richard Rosecrance more recently has suggested that bipolarity and multipolarity may each have their peculiar costs and benefits. Bipolarity, according to Rosecrance, is distinguished by (1) an absence of “peripheries,” such as areas for colonial expansion or neutral powers to woo; (2) all international behavior is highly politicized; (3) there are many crises; (4) changes in power confrontations are either significant or trivial, with no intervening shades of gray; (5) each pole is dominated by major powers highly motivated to expand their domains, willing even to incur brinksmanlike situations and hostility spirals; (6) no detente is possible. Multipolarity, on the other hand, is hypothesized to have (1) more interaction opportunities and thus less preoccupation (or obsession) with any one set of states; (2) fewer arms races; (3) more international conflicts; (4) the outcomes of international conflicts are harder to predict in advance; (5) changes in power confrontations have ambiguous consequences for the overall distribution of power. Rosecrance, therefore, urges a “bi-multipolar” arrangement that would combine the best features of both alternatives. The empirical questions and intriguing hypotheses so eloquently raised by Kaplan, Waltz, Deutsch, Singer, and Rosecrance have remained largely unexamined, however.