Unilateral disarmament is a

policy Policy is a deliberate system of guidelines to guide decisions and achieve rational outcomes. A policy is a statement of intent and is implemented as a procedure or protocol. Policies are generally adopted by a governance body within an or ...

option, to renounce weapons without seeking equivalent concessions from one's actual or potential rivals. It was most commonly used in the twentieth century in the context of ''

unilateral nuclear disarmament Nuclear disarmament is the act of reducing or eliminating nuclear weapons. Its end state can also be a nuclear-weapons-free world, in which nuclear weapons are completely eliminated. The term ''denuclearization'' is also used to describe the pro ...

'', a recurrent objective of

peace movement A peace movement is a social movement which seeks to achieve ideals such as the ending of a particular war (or wars) or minimizing inter-human violence in a particular place or situation. They are often linked to the goal of achieving world pe ...

s in countries such as the

United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Northwestern Europe, off the coast of European mainland, the continental mainland. It comprises England, Scotlan ...

. Nations do not often choose to dismantle their entire military capability. Unilateral disarmament is usually sought in one technical competency, such as

weapons of mass destruction A weapon of mass destruction (WMD) is a Biological agent, biological, chemical weapon, chemical, Radiological weapon, radiological, nuclear weapon, nuclear, or any other weapon that can kill or significantly harm many people or cause great dam ...

. Non-violent political movements from that of

Mahatma Gandhi Mohandas Karamchand Gandhi (2October 186930January 1948) was an Indian lawyer, anti-colonial nationalism, anti-colonial nationalist, and political ethics, political ethicist who employed nonviolent resistance to lead the successful Indian ...

to the

Campaign for Nuclear Disarmament The Campaign for Nuclear Disarmament (CND) is an organisation that advocates unilateral nuclear disarmament by the United Kingdom, international nuclear disarmament and tighter international arms regulation through agreements such as the Nucl ...

have recommended unilateral disarmament as a step toward world peace. Unilateral nuclear disarmament could also happen were a series of cascading failures to occur. For example loss of expertise, inability to finance, recapitalize and maintain the existing nuclear capability. Procrastination and neglect of existing nuclear weapon platforms and infrastructure to such an extent that a nation is unable to reconstitute its nuclear capability in time before portions of the system(s) begin to break down. Where that nation's nuclear deterrence then becomes questionable and uncertain.

By country

Costa Rica

The only recent candidate for having performed an act of complete disarmament is

Costa Rica Costa Rica, officially the Republic of Costa Rica, is a country in Central America. It borders Nicaragua to the north, the Caribbean Sea to the northeast, Panama to the southeast, and the Pacific Ocean to the southwest, as well as Maritime bo ...

, which unilaterally disarmed and

demilitarized A demilitarized zone (DMZ or DZ) is an area in which treaties or agreements between states, military powers or contending groups forbid military installations, activities, or personnel. A DZ often lies along an established frontier or boundary ...

itself in 1948, writing its non-military status into its constitution in 1949. In a public ceremony to mark the occasion, the existing Commander-in-Chief handed the keys to Army HQ to the Minister of Education, for use as a school. Since that time, Costa Rica has been briefly invaded once, by

Nicaragua Nicaragua, officially the Republic of Nicaragua, is the geographically largest Sovereign state, country in Central America, comprising . With a population of 7,142,529 as of 2024, it is the third-most populous country in Central America aft ...

, but has maintained its territorial integrity.

United States

Although former

US President The president of the United States (POTUS) is the head of state and head of government of the United States. The president directs the executive branch of the federal government and is the commander-in-chief of the United States Armed For ...

Richard Nixon Richard Milhous Nixon (January 9, 1913April 22, 1994) was the 37th president of the United States, serving from 1969 until Resignation of Richard Nixon, his resignation in 1974. A member of the Republican Party (United States), Republican ...

expressly denounced unilateral disarmament in 1969, Nixon's unilateral discontinuation of biological weapons development in 1972 is often characterized as a "unilateral disarmament".

South Africa

South Africa voluntarily gave up its nuclear weapons programme after the end of

apartheid Apartheid ( , especially South African English: , ; , ) was a system of institutionalised racial segregation that existed in South Africa and South West Africa (now Namibia) from 1948 to the early 1990s. It was characterised by an ...

Belarus, Kazakhstan and Ukraine

Belarus, Kazakhstan and Ukraine inherited nuclear weapons from the

Soviet Union The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet ...

that were deployed in their territories. The three countries voluntarily gave up the weapons in 1996 after the

Russian Federation Russia, or the Russian Federation, is a country spanning Eastern Europe and North Asia. It is the list of countries and dependencies by area, largest country in the world, and extends across Time in Russia, eleven time zones, sharing Borders ...

, the

and the

United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...

assured these three countries that they will not threaten or use military force or economic coercion against them through the

Budapest Memorandum on Security Assurances The Budapest Memorandum on Security Assurances comprises four substantially identical political agreements signed at the Conference on Security and Co-operation in Europe (CSCE) in Budapest, Hungary, on 5 December 1994, to provide security assu ...

. Russia broke the assurance by annexing Crimea from Ukraine in 2014 and launching a full scale invasion of Ukraine in 2022.

References

{{reflist

External links

United Nations Institute for Disarmament Research
Political terminology Nuclear weapons governance Anti-militarism Military strategy