...Viewed from the perspective of its capabilities, rather than its intentions, Iran presents five major kinds of current and potential threats:
• The first is as a conventional military power. Iran has limited capabilities today but could become a much more threatening power if it modernized key elements of its forces and its neighbors did not react.
• The second is as an asymmetric threat that can seek to intimidate or attack using unconventional forces. Iran has established a large mix of unconventional forces that can challenge its neighbors in a wide variety of asymmetric wars, including low-level war of attrition.
• The third is to some extent an extension of the second. Iran’s asymmetric and unconventional capabilities give it the ability to use proxies and partners in the form of both state and non-state actors. Iran’s support of Shi’ite militias in Iraq, ties to elements in the Iraqi government, partnership with Syria, and ties to the Hezbollah in Lebanon are all practical examples of such activities.
• The fourth is a potential nuclear power armed with long-range missiles. Iran is a declared chemical weapons power. Its biological weapons efforts are unknown but it seems unlikely that it remained passive in reaction to Iraq’s efforts. It has openly made the acquisition of long-range missile a major objective, and its nuclear research and production programs almost certainly are intended to produce nuclear weapons.
• Finally, Iran presents a potential religious and ideological threat in a region and Islamic world polarized along sectarian lines. For all of the talk about a clash between civilizations, the potential clash within Islam seems far more dangerous. The risk that Sunni and Shi’ite extremists can provoke a broader split between sects and nations could push Iran into a more aggressive religious and ideological struggle.
These are potential threats, not predictions of Iranian actions. They all can be contained with the right choice of policies and military actions. Barring major shifts in its regime, Iran not only is deterrable, but a nation that will probably respond to the proper security incentives over time. The real question may well be whether Iran’s neighbors and the US provide the right mix of deterrence and incentives, and not Iran’s current and potential strength....
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