Arms Race, Space Race, and Détente

6.1 Nuclear Arms Race

The Cold War's most dangerous dimension was the nuclear arms race — both superpowers built ever-larger arsenals capable of destroying humanity many times over:

Milestone	USA	USSR
First atomic bomb	16 Jul 1945 (Trinity Test)	Aug 1949
First hydrogen bomb	Nov 1952	Aug 1953
First ICBM	Sep 1959 (Atlas)	Aug 1957 (R-7 Semyorka)
Peak arsenal	~31,255 warheads (1967)	~45,000 warheads (1986)
Strategic arms treaties	SALT I (1972), SALT II (1979), START I (1991)	—

MAD — Nuclear Deterrence Theory

Mutual Assured Destruction (MAD): Both sides understood that any nuclear first strike would trigger a devastating retaliatory second strike — neither side could "win" a nuclear war. This paradoxically prevented direct superpower conflict. The strategy required both sides to maintain "second-strike capability" — nuclear weapons survivable enough to destroy the attacker even after absorbing their attack.

Nuclear Proliferation

• UK: first test 1952; France: 1960; China: 1964 (Soviet assistance, then independent)
• Partial Test Ban Treaty (1963): Banned atmospheric, underwater, and space nuclear tests — only underground tests permitted
• Nuclear Non-Proliferation Treaty (NPT, signed 1 July 1968): Entered into force 1970; 190+ signatories; India, Pakistan, Israel, North Korea not signatories

Anti-Ballistic Missile Treaty (ABM Treaty, 1972): USA and USSR agreed to limit missile defence systems — the rationale was that defensive systems could allow a first strike while surviving retaliation, undermining MAD's stability.

6.2 The Space Race

The Space Race was a crucial Cold War competition for scientific prestige and military-technological supremacy:

Achievement	Who	Date
First artificial satellite — Sputnik-1	USSR	4 October 1957
First animal in space — Laika (dog)	USSR	3 November 1957
First human in space — Yuri Gagarin	USSR	12 April 1961
First American in orbit — John Glenn	USA	20 February 1962
First woman in space — Valentina Tereshkova	USSR	16 June 1963
First spacewalk — Alexei Leonov	USSR	18 March 1965
First Moon landing — Apollo 11 (Neil Armstrong, Buzz Aldrin)	USA	20 July 1969
First space station — Salyut 1	USSR	19 April 1971

Strategic and Civilian Significance

ICBMs (Intercontinental Ballistic Missiles) that could deliver nuclear warheads used the same technology as space launch vehicles. Sputnik's launch terrified the US military — it proved the Soviets could deliver nuclear warheads anywhere on Earth.

The Space Race also generated technologies now essential to civilian life: GPS, satellite communications, miniaturised electronics, memory foam, CAT scanners, water filtration, freeze-dried food.

Sputnik shocked the US into massive investment in science education — the National Defense Education Act (1958) pumped $1 billion into science, math, and foreign language teaching.

6.3 Détente 1969–79

Détente (French: relaxation) was the deliberate easing of Cold War tensions in the early 1970s, based on recognition that the Cold War had become dangerously expensive.

Nixon-Kissinger Triangular Diplomacy

US National Security Advisor Henry Kissinger engineered a strategic realignment:

• Nixon's visit to China (February 1972): First US presidential visit to the People's Republic of China; USA acknowledged the "One China" policy; Sino-Soviet split exploited — China became a de facto counterweight to USSR
• Nixon's visit to USSR (May 1972): Summit with Brezhnev; signed SALT I

Key Détente Agreements

Agreement	Date	Content
SALT I (Strategic Arms Limitation Talks)	May 1972	Froze strategic nuclear arsenals at existing levels; ABM Treaty signed simultaneously
Basic Principles Agreement	May 1972	US-USSR pledged to avoid military confrontations and develop bilateral relations
Helsinki Accords	August 1975	35 nations recognised post-WWII European borders; human rights provisions (Basket Three) became a tool for Eastern European dissidents
SALT II	June 1979	Set equal ceilings for both sides' strategic delivery vehicles (never ratified by US Senate after Afghanistan invasion)

Collapse of Détente

• Soviet invasion of Afghanistan (December 1979): Carter called it "the most serious threat to world peace since WWII"; imposed grain embargo; US boycotted 1980 Moscow Olympics
• Reagan's "Evil Empire" (1983): Reagan declared the USSR an "evil empire" and dramatically increased military spending — "Reagan Doctrine" backed anti-communist guerrillas in Afghanistan, Angola, Nicaragua
• SDI ("Star Wars", 1983): Reagan proposed space-based missile defence — would potentially undermine MAD and Soviet deterrence; Soviets alarmed

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