A Change in U.S. Nuclear Strategy: “Non-Nuclear Umbrella” Becomes Bigger

Published in Asahi Shimbun
(Japan) on 7 April 2010
by (link to originallink to original)
Translated from by Huifang Yu. Edited by Harley Jackson.
U.S. President Barack Obama took a decisive step on nuclear strategy.

At a U.S. press conference, it was announced that non-nuclear states that comply with the Nuclear Non-Proliferation Treaty (NPT) will not be attacked. In principle, the U.S. will not carry out retaliatory attacks using nuclear weapons, even if the U.S. is faced with attacks from conventional, biological or chemical weapons, or cyber-attacks. Reducing the role of nuclear weapons is a significant change and one of the pillars of the latest Nuclear Posture Review.

Nuclear deterrence to safeguard allies is called the "nuclear umbrella.” This new security policy, which guarantees not attacking non-nuclear states by using nuclear weapons, could be known as the "non-nuclear umbrella.”

Until now, the U.S. has put nuclear powers and their allies outside of the "non-nuclear umbrella.” Obama's new strategy targets more than 180 countries of the NPT treaty. The broadening of the "non-nuclear umbrella" means there are even more clear advantages for each member to adhere to the treaty. If this non-nuclear strategy is actually carried out, security will be even more widespread. If the idea takes root, it will become a force driving further change in the world.

The big challenge from now is: Will nuclear powers other than the U.S. agree to the "non-nuclear umbrella" as the new global standard?

So far, the basic strategy of Russia, even when dealing with non-nuclear countries, would be to use nuclear weapons. Compared to the North Atlantic Treaty Organization (NATO), Russia is reluctant to refrain from using nuclear weapons since its conventional forces are weak. First of all, will NATO agree with Obama's new nuclear strategy? Once the United Kingdom and France, members of NATO, agree to the new tactic and nuclear armament reduction, security talks will proceed, and Russia, too, will have to push for the "non-nuclear umbrella.”

China has repeatedly made it clear that it would not be the first to use nuclear weapons in an attack. As long as the strategy is in earnest, agreeing with President Obama's push for the "non-nuclear umbrella" should enhance China’s foreign diplomacy in a positive way. Hu Jintao, the country's president, will also be attending the nuclear summit that will take place on the 12th and 13th in Washington. Although the main theme of this summit will be the prevention of nuclear terrorism, leaders of the U.S. and China will also discuss not using nuclear weapons against non-nuclear states.

In the process of revising the Nuclear Posture Review, the policy of maintaining nuclear weapons for the “sole purpose” of deterring a nuclear attack was reconsidered. But any new nuclear policy will be shelved until deterrence measures toward North Korea and Iran can be established within the new strategy’s framework, since military officials in the U.S. are still wary of these two countries.

It was suggested at the Japan-Australia Summit Meeting last December that, by 2012, all nuclear powers declare their nuclear weapons programs as existing for the “sole purpose” of deterrence. But even if achieving this by 2012 is impossible, it would be good to urge countries toward such a declaration as early as possible.

Obama's new nuclear strategy is a revolutionary step, yet it cannot stop here. Japan has to join Obama’s efforts by continuing to reduce the role of nuclear weapons and strengthen diplomatic efforts so that nuclear powers will declare their use of nuclear weapons as solely for the purpose of deterrence.



米核戦略転換―「非核の傘」さらに大きく

 オバマ米大統領が、核戦略について英断を下した。

 米紙との会見で、核不拡散条約(NPT)を順守する非核国に対しては核攻撃をしない方針を明らかにした。通常兵器はもちろん、生物・化学兵器による攻撃やサイバー攻撃に対しても、原則として核による報復攻撃をしない。核の役割を縮小する転換である。最新の核戦略見直しの柱の一つだ。

 同盟国を核抑止で守ることは「核の傘」と呼ばれる。これに対し、非核国を核攻撃しないと保証することは「非核の傘」とも言うべき、新たな安全保障政策である。

 米国はこれまで、核兵器を持つ国はもとより、その同盟国も「非核の傘」の外に置いてきた。オバマ新戦略によると、これからはNPT加盟の180カ国以上の非核国が対象となる。「非核の傘」が広がることで、NPTの一員として条約を順守する利点もはっきりする。非核を徹底すれば安全もより確かになる、という考えを根づかせる力になろう。

 今後の大きな課題は、米国以外の核保有国を同調させて、「非核の傘」を世界標準にできるかどうかだ。

 今のところ、ロシアは非核国に対しても核使用を辞さないというのが基本戦略だ。北大西洋条約機構(NATO)に比べて通常戦力で劣るロシアの態度は硬い。まずはNATOが、オバマ新戦略に合わせるのが得策だろう。NATOメンバーである英仏もそれに賛同したうえで、より包括的な軍縮、安全保障協議を進め、ロシアも「非核の傘」を広げるよう、促すべきだ。

 中国は、核の先制使用はしないとの立場を繰り返し表明している。真剣な戦略であるなら、オバマ大統領に同調して、「非核の傘」を広げる外交を積極的に展開すべきだろう。12、13日にワシントンで開催される核保安首脳会議には、胡錦濤(フー・チンタオ)国家主席も参加する。主要テーマは核テロ防止だが、米中首脳会談を開き、非核国への核不使用の徹底についても話し合ってはどうか。

 核戦略見直しの過程では、核攻撃の抑止を核兵器の「唯一の目的」とする方針も検討された。しかし、そこまで目的を限定すると、北朝鮮やイランなどの非核兵器に対する抑止力が弱まるとの国防総省の慎重論もあり、見送られた。

 日豪主導の国際賢人会議は昨年12月、2012年までにすべての核保有国が「唯一の目的」宣言をするよう提言している。12年が無理でも、できるだけ早期の宣言を促している。

 オバマ新戦略は画期的な一歩だが、ここで立ち止まらせてはならない。日本は、核の役割をさらに軽減して核軍縮を進めていくために、核保有国が「唯一の目的」宣言に向かうよう、外交努力を強めていくべきである。
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