The James Martin Center for Nonproliferation Studies (CNS), established in 1989, also known as the Center for Nonproliferation Studies, is a research and training center dedicated to addressing the global challenges posed by nuclear weapons and other weapons of mass destruction. It is the largest nongovernmental organization in the United States focused exclusively on nonproliferation issues. Its mission is to educate and train future generations of specialists in nonproliferation, and to provide timely analysis and information to support policy and research efforts. After a large endowment gift in 2007 by James Martin, CNS was renamed in his honor.
The headquarters of CNS is at the Middlebury Institute of International Studies at Monterey, in Monterey, California. In addition, CNS oversees the Vienna Center for Disarmament and Non-Proliferation in Vienna, Austria, and also maintains a significant presence at its offices in Washington, D.C., to facilitate engagement with policymakers, international organizations, and other stakeholders. CNS also publishes the Nonproliferation Review and NonPro Notes. In August 1998, CNS established the Newly Independent States Representative Office (NISRO) offices in Almaty, Kazakhstan, which was closed in 2009.
On August 26th, 2025, CNS announced that it would open new offices on the main Middlebury College campus in Vermont. The next day, on August 27th, the President of Middlebury College announced the closure of MIIS and that all academic programs at the institute would conclude sometime in July 2027. CNS, however, as a "self-sustaining center", will remain open in Monterey, and under the umbrella of Middlebury College after 2027.
History William C. "Bill" Potter was originally trained as a specialist on the Soviet Union, and in 1982 authored his first book, Nuclear Power and Nonproliferation, on the technological, economic, and political dimensions of nuclear nonproliferation. His research drew attention to similarities in Soviet and United States approaches to nuclear export controls and nonproliferation policy, as well as to the areas of cooperation that developed between the two states despite their rivalry during the Cold War. By the time of the Dissolution of the Soviet Union, Potter, at that time the director of the graduate school involved in Eurasian and Soviet studies at the Monterey Institute of International Studies (MIIS), was among the few scholars with expertise both in Soviet affairs and in the challenges posed by the spread of nuclear weapons.
In the time leading up to the Dissolution, Potter became increasingly concerned about the security of nuclear weapons and related materials. Potter, and many of his fellow global security scholars at the time, were predicting a collapse of the entire soviet economy. When that happened, they greatly feared that nuclear materials would both be available on a black market, and that if new states were created, they might each have access to fissile materials and nuclear weapons. Potter saw the need to address the academic and policy perspectives surrounding the study of proliferation and the advancement of nonproliferation.
Potter's primary motivation was in response to what he viewed as a lack of systematic, open-source research on proliferation. At the time, while conducting studies on international nuclear commerce, Potter noted that even researchers at the United States national laboratories were often unable to answer basic questions about nuclear trade. He argued that even though large amounts of relevant information were available in open sources and specialized trade publications, this material was rarely collected or analyzed in a systematic way.
CNS opened in 1989 with a small staff and limited resources, operating out of two offices with an initial budget of $35,000, becoming in the process one of the first academic institutions in the United States to focus exclusively on issues of nonproliferation.
Over the following decade, CNS expanded significantly, establishing itself as the only institution in the United States to offer a graduate certificate program in nonproliferation studies. By bringing together students, government officials, and researchers from around the world, the center sought to advance education and research on WMD's while contributing to international security.
Structure
By the early 2000s, CNS was organized into five research programs:
Chemical and Biological Weapons Program East Asia Nonproliferation Program International Organization and Nonproliferation Program Weapons of Mass Destruction Terrorism Research Program Newly Independent States Nonproliferation Program The programs have changed, both due to budgetary constraints and due to evolving realities in nonproliferation. For example, the term "NIS" to mean a Newly Independent State has become largely outdated, and especially for those states in Central Asia, the geographical preference is to refer to the regional names.
As of 2025, the programs of CNS are structured as;
Chemical & Biological Weapons Nonproliferation Program (CBWNP), Director Allison Berke East Asia Nonproliferation Program (EANP), Director Jeffrey Lewis Eurasia Nonproliferation Program (ENP), Director Hanna Notte Export Control and Nonproliferation Program (XNP), Director Robert Shaw International Organizations & Nonproliferation Program (IONP), Director Gaukhar Mukhatzhanova Middle East Nonproliferation Program, Director Chen Kane Nonproliferation Education Program, Director Juan du Preez
Publications and databases
Bill Potter initially proposed the idea of building a comprehensive database of open-source information to the U.S. Department of State, but the project was rejected as too costly. He subsequently pursued the initiative independently, purchasing software and hiring a small team of researchers and a programmer to develop what became known as the Emerging Nuclear Suppliers Database. This database compiled and analyzed international trade data relevant to nuclear technologies.
By the early 1990s, the CNS database was being used by both the U.S. government and the International Atomic Energy Agency (IAEA). Information gathered by Potter and his colleagues contributed to identifying elements of Iraq and Libya's nuclear programs and provided details on the proliferation activities of Abdul Qadeer Khan's network, which transferred nuclear technology to countries including Iran, North Korea, and Libya. The database and related projects became the foundation for CNS's broader work in applying open-source research to the study of weapons of mass destruction.
Prior to the year 1996, electronically-produced materials produced by CNS were only available on floppy disks under MS-DOS. The databases were expanded to new platforms in 1996, becoming accessible through both the Internet and Windows. The materials were organized with the Metamorph search engine, which allowed users to efficiently process a collection of more than 20,000 records drawn since 1986 from approximately 140 sources, including publications, news agencies, and unpublished material.
The CNS databases were divided into three main areas; nuclear materials and technologies, ballistic and cruise missile technologies, and nuclear developments in the former Soviet republics. The nuclear database monitored international trade and other developments in nuclear technology, while the missile database tracked trade in missile and missile defense systems. The database on the Commonwealth of Independent States (CIS) focused on regional nuclear developments. These resources were widely regarded as valuable for assessing nuclear and missile programs and identifying the transfer of technologies that contributed to their advancement.
Sandia National Laboratories was one of the first customers subscribed to CNS's web-based system, making use of the new automated online updates and advanced search functions. The CNS website also served as a portal linking to other major online resources in the field of defense and proliferation studies.
In 1997, CNS developed a specialized database focusing on China's arms control and nonproliferation policies. This initiative was launched as part of the East Asia Nonproliferation Project (EANP), which began in 1995 and included academic exchanges with students from Fudan University in Shanghai. The China-focused database project started in 1996 under the direction of Bates Gill, an East Asia security expert who had previously led the Project on Security and Arms Control in East Asia at the Stockholm International Peace Research Institute (SIPRI) and taught at the Johns Hopkins University Center for Chinese and American Studies in Nanjing.
The China Profiles database, available on CD-ROM and through paid subscription on CNS's website, compiled hundreds of official documents and provided a detailed analysis of shifts in China's stance on proliferation. It outlined China's official and unofficial cooperation with other countries in nuclear and missile programs, included an English-Chinese glossary of technical terms, provided a chronological record of relevant events, and identified key Chinese officials and organizations involved in civil and military nuclear programs, missile development, and arms exports.
The database documented China's refusal to formally join the Missile Technology Control Regime (MTCR) while committing to follow its guidelines, its intention to rejoin the Zangger Committee (ZAC), and its decision not to become a member of the Nuclear Suppliers Group (NSG), which enforced stricter export controls. It also detailed Chinese missile exports to countries such as Syria and Pakistan and provided information on the companies involved, including leadership and facility locations. Additional CNS projects were underway at the time to develop similar databases covering North and South Korea.
The Nonproliferation Review
The Nonproliferation Review is a scholarly peer-reviewed and refereed journal that examines the spread of nuclear, chemical, and biological weapons and international efforts to limit or reverse that spread. The journal publishes case studies, theoretical analyses, historical accounts, research reports, viewpoints, and book reviews on subjects including state weapons programs, treaties and export controls, safeguards, verification and compliance, disarmament, terrorism, and the economic and environmental impacts of weapons proliferation. In other words its articles cover a broad range of topics, including; national weapons programs, treaty negotiations and implementation, export controls, verification systems, disarmament initiatives, terrorism involving weapons of mass destruction, and the wider political, economic, and environmental consequences of proliferation.
Contributions are written by both academics and practitioners, including former government officials and policy specialists. Since its establishment, the journal has been regarded as a reference point for researchers and policymakers concerned with arms control and nonproliferation.
Submissions undergo editorial screening and external peer review. Research articles are generally reviewed by multiple anonymous referees, while opinion pieces are evaluated through a lighter process, and book reviews are assessed directly by the editorial team. Special issues or sections may involve alternative review procedures depending on the editors' decisions.
NonPro Notes Nonpro Notes is a publication series produced by the CNS office in Washington, D.C. The series features focused results from ongoing research, presenting methods, data, or tools that fall outside the scope of traditional peer-reviewed journals. Its purpose is to circulate preliminary insights and encourage further study and publication on issues related to nonproliferation.
Center for Nonproliferation Studies in Washington, D.C. (CNS DC)