Détente: Meaning and Causes of Détente

Détente is a French word which means relaxation of tensions. It was used to describe the normalisation of relations between the USA and the USSR in international relations. During the 1970s, both superpowers decided to overcome the cold war and relax their relations into the era of détente. But a new cold war was started on early 1980s. Fortunately, the new cold war got replaced by new détente in 1987. The new détente played a big role in ending the cold war in international relations.

The oxford dictionary defined détente in two ways: the succession of strained relation between states and as friendly understanding between states. In 1974, professor A.P. Rana observed the term Détente in its contemporary manifestation cannot with any accuracy be categorised either as the succession of strained relations between the 2 superpowers or as friendly understanding between them.

Détente represent a much more complex relationship between the superpowers than these definitions indicate. Professor Rana conceptualises détente as a collaboration, competitive behaviour of the superpowers. Thus, détente doesn’t mean the conclusion of agreements, treaties, trade pacts, but reduction of tensions in mutual relations.

Causes of First Détente

The following were the chief reasons for the emergence of détente of 1970s:

1. Cuban Missile Crisis - The 1962 Cuban Missile Crisis stands as the most terrifying turning point in the Cold War because it stripped away the theoretical nature of nuclear conflict. For thirteen days, the world held its breath as John F. Kennedy and Nikita Khrushchev engaged in a high-stakes standoff that brought the planet to the brink of a thermonuclear exchange. The realization that a simple miscommunication or a low-level commander's panic could trigger the end of human civilization was a big concern for both leaders. The concern of Nuclear War directly birthed the "Hotline" between the Kremlin and the White House, moving the superpowers toward a model of crisis management. It proved that without a baseline of diplomatic stability, the risk of accidental war was unacceptably high, making Détente not just a preference, but a survival strategy.

2. Fear of nuclear war – Beyond specific crises, the general fear of nuclear war became a permanent fixture of global psychology, eventually manifesting as the doctrine of Mutually Assured Destruction (MAD). By the late 1960s, both the U.S. and the USSR had reached a point where neither could launch a first strike without being utterly destroyed in return. This "balance of terror" created a paradoxical incentive for peace; since military victory was no longer a viable outcome of war, the only way to "win" was to ensure that war never happened. This fear necessitated formal arms control agreements to manage the skyrocketing costs and risks of the arms race, leading to the Strategic Arms Limitation Talks (SALT). Détente, in this context, was the formalization of the realization that nuclear weapons had made traditional total war obsolete.

3. Increased Sino-Soviet differences – The Sino-Soviet split fundamentally altered the "bipolar" logic of the Cold War, as the ideological and territorial rivalry between the Soviet Union and China turned into open hostility. This internal rift within the communist world meant the Soviet Union could no longer focus solely on the West; it now faced a legitimate threat from its own neighbour to the east. To avoid the catastrophic scenario of a two-front war, the Kremlin was incentivized to lower the temperature of its conflict with the United States. Simultaneously, the U.S. saw a golden opportunity in "Triangular Diplomacy," where it could improve relations with both Moscow and Beijing to play them against each other. This geopolitical shift forced the USSR to the negotiating table, as they could not risk being isolated by a potential U.S.-China alliance.

4. The Rise of Soviet Global Parity – By the turn of the decade, the increased role of the Soviet Union and the Soviet Bloc in world politics meant that the West had to stop treating the USSR as an ideological aberration and start treating it as a permanent global power. The Soviet Union had achieved strategic parity, meaning its military might finally equalled that of the United States. For Soviet leaders like Leonid Brezhnev, Détente was a tool to gain international recognition of the USSR’s superpower status and to solidify its control over Eastern Europe. By seeking a "relaxed" atmosphere, the Soviet Bloc hoped to gain access to Western technology and grain markets, stabilizing its internal economy while the West aimed to integrate the Soviet Union into a predictable international system that reduced the chances of erratic aggression.

5. The Influence of the Non-Aligned Movement (NAM) – The Non-Aligned Movement provided a crucial moral and political "third way" that challenged the binary logic of the Cold War. Comprised of newly independent nations from the "Global South," NAM leaders argued that the superpower rivalry was a waste of global resources and a threat to the sovereignty of smaller nations. By refusing to join either bloc, NAM pressured the U.S. and the USSR to justify their actions to a global audience. This movement effectively "shamed" the superpowers into de-escalation, pushing the narrative that true global leadership required more than just military dominance. The existence of a large, neutral bloc meant that both the U.S. and the USSR had to compete for influence through diplomacy and economic aid rather than just proxy wars, fueling the transition toward Détente.

6. Failure of the U.S.A. in Vietnam War – The failure of the United States in the Vietnam War served as a massive blow to the "Containment" strategy that had dominated American foreign policy since 1947. The war proved that American military might had limits, especially in the face of nationalist movements, and it left the U.S. domestic economy and social fabric in tatters. With the American public increasingly hostile toward foreign interventions and the "Vietnam Syndrome" taking root in Congress, Washington was forced to scale back its global commitments. Détente became the primary vehicle for this retreat; by easing tensions with the Soviet Union, the U.S. could maintain its global influence through diplomatic "linkage" and treaties rather than through the blood and treasure of another ground war.

Progress of détente of 1970s

1. Moscow-Bonn Agreement, 1970 – On 12 August 1970, Moscow-Bonn agreement was signed by Kosygin and Willy Brandit, whereby both sides accepted status quo in respect of Germany and concluded a mutual non-aggression, non-use of force agreement. This agreement went a big way to reduce cold war tensions in Germany and paved the way for rapprochement between West Germany and East Germany. (The 2 Germany(s) merged to form a united Germany in 1991).
2. Berlin Agreement, 1971 – After the Moscow-Bonn agreement, the west German chancellor initiated measures for resolving the Berlin problem. After prolonged negotiations on 3 September 1971, USA, USSR, Britain and France signed a 4-power agreement on Berlin. By this agreement it was decided to maintain the status quo but at the same time permit the people of the West Berlin to go to East Berlin and German Democratic Republic. This agreement led to considerable reduction in tension over Berlin issue.
3. Korean Agreement, 1972 – By an agreement of 7 July 1972, both North Korea and South Korea agreed to work for normalising their relations and desist from undertaking any such action as may lead to weakness of any one-of them. This agreement was followed by another agreement in 1973 whereby both the countries agreed to promote mutual co-operation in in various spheres of relations.
4. East Germany – West Germany Agreement, 1972 – On 8 November 1972, an agreement was signed between East Germany (GDR) and West Germany (FRG), whereby both agreed to recognise each other and to work for the promotion of mutual co-operation in various spheres of their relations. Both affirmed a commitment to renounce the use of force for the settlement of German problem. This agreement virtually ended the old era of cold war in Germany. In the 28^th session of UN General Assembly both the states, FRG and GDR participated as sovereign states.
5. Helsinki Conference (1973) and Helsinki Agreement, 1975 – The Helsinki conference on European security was held from 3 to 5 July, 1973 and the European nations, both communist and non-communist expressed with one voice the need to increase their mutual contacts and co-operation in international relations. It was agreed that no nation should try to resort to force for securing the desired goals of national interest. On 1 august, 1975, heads of 35 states of Europe and America entered into the Helsinki agreement, which laid down a code of conduct for orderly and peaceful conduct of their relations. 33 out of 34 European states (i.e., the whole of Europe except Albania) along with the USA and Canada agreed to work for the promotion of mutual co-operation without any consideration for the communist or non-communist nature of the political systems of the states.

The final act contained 10 principles:

1. Sovereign equality of all nations;
2. Respect of rights of all, implied in national security;
3. Neither to use nor threaten the use of force;
4. Inviolability of frontiers and territorial integrity of states;
5. Peaceful settlements of international disputes;
6. Non-interference in the internal affairs of each other;
7. Freedom of expression and of faith and worship and respect for human rightsand fundamental freedom;
8. Equality and people’s right of self-determination;
1. Co-operation among states; and
10. Observance of responsibilities implied in international law.

6. End of war in Cambodia (1975) – In April 1975, the end of war in Cambodia as a result of the victory of the Sihanouk forces ended the civil war in Cambodia. It ended another centre of Cold War in Indo-China.
7. End of Vietnam War (1975) - On 30 April, 1975, the war in Vietnam came to an end. It resulted into the unification of Vietnam. The end of war in Vietnam greatly helped the process of decline of cold war, as since mid-sixties Vietnam had been proving to be a major centre of Cold War in international relations.
8. USA-China Rapprochement – The emergence of Sino-US détente in 1971, further helped the international community to come out of the era of cold war. It paved the way for the China’s entry into the UNO and eliminated an anachronism in international relations of post-war period. However, the emergence of increased conflict between the China and the USSR considerably reduced the possible advantages that could have been secured as a result of Chinese rehabilitation in the international system.
9. Third European Security Conference, 1977 – It was held in June 1977 at Belgrade and an attempt was made to strengthen the Helsinki spirit.
10. Camp David Accord between Egypt and Israel, 1979 – The conclusion of Camp David Accord between Egypt and Israel, on 26 March, 1979, was another significant development which took place as a result of the efforts made by the US President, Mr. Carter. It was a sort of treaty between Egypt and Israel and was designed to reduce the conflict in the Middle East.
11. American-Soviet Détente – A very welcome development of the 1970-80 years was the emergence of a full détente between the two superpowers. The mutual contacts between the leaders of the two countries in the post 1962 – period helped the emergence of US-USSR Détente. In May 1972, US President Nixon visited USSR and signed two important agreements – The Treaty on the Limitation of Anti-Ballistic Missile Systems and the interim agreement on certain measures with respect to the Limitation of Strategic Offensive Arms (SALT). In June 1973, the soviet Communist Party Chief, Brezhnev paid a return visit to Washington. During his visit four agreements were signed with a view to increase their mutual co-operation in spheres of research in agriculture, transportation and oceanography and expansion of cultural and scientific exchanges. Both Nixon and Brezhnev agreed to avoid nuclear war and to hold immediate and urgent consultations at any time wherever there appeared a risk of nuclear war. Both the countries agreed to co-operate in the forthcoming Helsinki Conference. In 1974, President Ford and Brezhnev met at Vladivostok and agreed on “the essentials of a new accord limiting strategic offensive weapons for the next 10 years.” The kept up their contacts and held bilateral talks at the time of 1975, Helsinki Conference. In 1975, the space-handshake between the US and the Soviet astronauts clearly reflected the progress made by détente between the two super powers. On 15 June, 1979, the two countries concluded the SALT II Agreement.