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"While Americans understand relations with Iran in terms of its nuclear program and incendiary anti-Israel homilies, Iranians see the relationship as part of a long and troubling history of foreign intervention and exploitation that reaches back into the nineteenth century. Iranian leaders argue that if interactions between Iran and the United States are to improve, this history will have to be addressed and rectified."

"All of these pathologies were evident in the failure to prevent or appropriately respond to the Mumbai attacks. There was in fact significant intelligence suggesting a seaborne terrorist attack was likely, and even that prominent sites such as the Taj Hotel would be targeted. This information, however, was ignored by several key bureaucratic actors—including the Coast Guard and the Maharashtra state director-general of police—because it was deemed unactionable. Others, such as the Maharashtra Anti-Terrorism Squad, at least attempted some kind of preparation. The differences in readiness highlight the extent of fragmentation among the security apparatus. Even when Mumbai police tried to take preventive action, they lacked the manpower to sustain increased security at the hotels. Once the attack occurred, the security forces did not have sufficient night-vision equipment, heavy weaponry, or information about the attack sites, leading to a long response time and the emergence of a disastrous siege...."

Although projections of nuclear proliferation abound, they rarely are founded on empirical research or guided by theory. Even fewer studies are informed by a comparative perspective. The two books under review—The Psychology of Nuclear Proliferation: Identity, Emotions, and Foreign Policy, by Jacques Hymans, and Nuclear Logics: Alternative Paths in East Asia and the Middle East, by Etel Solingen, are welcome exceptions to this general state of affairs, and represent the cutting edge of nonproliferation research. Both works challenge conventional conceptions of the sources of nuclear weapons decisions and offer new insights into why past predictions of rapid proliferation failed to materialize and why current prognoses about rampant proliferation are similarly flawed. While sharing a number of common features, including a focus on subsystemic determinants of national behavior, the books differ in their methodology, level of analysis, receptivity to multicausal explanations, and assumptions about decisionmaker rationality and the revolutionary nature of the decision. Where one author emphasizes the importance of the individual leader’s national identity conception in determining a state’s nuclear path, the other explains nuclear decisions primarily with regard to the political-economic orientation of the ruling coalition. Notwithstanding a tendency to overinterpret evidence, the books represent the best of contemporary social science research and provide compelling interpretations of nuclear proliferation dynamics of great relevance to scholars and policymakers alike.

G. John Ikenberry, professor of politics and international affairs at Princeton University's Woodrow Wilson School, and Stephen Walt, professor of international affairs at Harvard University's John F. Kennedy School of Government, participated in a debate at the Watson Institute for International Studies at Brown University on May 8, 2007. Christopher Lydon hosted the debate.

This article was prepared for a Council on Foreign Relations/International Institute for Strategic Studies Symposium on Iraq's Impact on the Future of US Foreign and Defence Policy, with generous support from Rita E. Hauser.