President Reagan launched the Strategic Defense Initiative (SDI) on March 23, 1983, twenty-eight years ago today. Part of a vision for a future without the constant threat of nuclear annihilation, SDI became a hot-button issue between the United States and the Soviet Union. Coincidentally, the issue of missile defense is being debated today between the United States and Russia, with Secretary Gates and Vice President Biden having both visited Moscow in the last two weeks.
On this timely anniversary, we should all sit down and read “Ronald Reagan and His Quest to Abolish Nuclear Weapons” by Paul Lettow. Perhaps then we would understand that true story of Reagan’s SDI and how hyper-conservative missile defense hawks have abandoned both their history and sensible foreign policies.
Missile defense proponents, like Senator Jim DeMint (R-SC), claim to be continuing Reagan’s legacy. “President Reagan fought to achieve peace through strength,” wrote DeMint in an op-ed on his blog, “And in doing so he led the U.S. to win the Cold War and put in place the beginnings of groundbreaking missile defense technology to protect our nation from rising threats. And ever since, the left has sought to stop, block, and defund our critical missile defenses that are continually proving to be successful and necessary.” DeMint proposes an expensive, technically impossible, and potentially catastrophic plan to deploy hundreds of missiles around the world.
This is not at all what Reagan intended.

According to Lettow’s well-argued monograph, Reagan never let his mind stray from his ultimate goal of ridding the world of nuclear weapons. SDI was intended as a necessary step forward in order to eventually draw down. “I happen to believe,” wrote Reagan, “that an effective defense weapon could bring closer the day when we could all do away with the nuclear threat.”
Furthermore, Reagan stated: “In my opinion, if a defensive weapon could be found and developed that would reduce the utility of these [missiles] or maybe even make them obsolete… Then [the President] could offer to give that same defensive weapon to [our adversaries] to prove that there was no longer any need for keeping these missiles. Or with that defense, he could then say to them, ‘I am willing to do away with my missiles. You do away with yours.’”
As Lettow puts it, “From the very beginning, Reagan had in mind that SDI would catalyze the elimination of all nuclear weapons, and that sharing a missile defense with the adversaries of the United States would play a role in that process. “
Whether or not Reagan understood the instability that SDI would introduce into US-USSR relations or truly believed in its technological feasibility, he latched onto it as a policy goal that would transform the superpower dynamic.
Even just the idea of missile defense was useful for Reagan in encouraging the Soviet Union to come to the negotiating table. The idea of SDI represented a new military strategy that could harness the strength of American innovation and leave the USSR in the dust technologically. Wanting to avoid a military space race, the Soviet Union really had no choice but to try to make an agreement on arms control.
Reagan also understood that the purpose of missile defense is not to provide an impenetrable shield that makes fallout shelters and duck-and-cover drills unnecessary. Dreaming about an airtight seal around the United States is an exploitative misinterpretation of Reagan’s intentions and a blatant overestimation of the technical capabilities of missile defense. For example, physicists estimate that the SM-3 Interceptor, which is crucial to U.S. missile defense plans, has a success-rate of about 20 percent.
Reagan instead sought defensive weapons as a step on the way to nuclear-zero. So, if we can manage to negotiate treaties that reduce nuclear arsenals without the need to spend billions of dollars on ineffective technologies, why not continue to reduce our stockpiles?
Reagan was working from the standpoint of a tense period in the Cold War. In the 21st century world, our leaders should recognize the ineffectiveness of introversion and advocating policies based on Cold War fears. The problems of nuclear weapons in the modern era can only be solved collectively. Building higher walls does nothing to make us safer when it comes to nuclear weapons, unless we cannot get to the table in the first place. Reagan understood this principle, but his contemporary colleagues do not.