Pearson Edexcel International GCSE in History · 4HI1 · Free · no account needed
A world divided: superpower relations, 1943–72
Option 6 · Paper 1 — depth study · 1943–72
Every lesson here ends the same way: learn it, teach it to an AI pupil who asks the awkward question, then defend it against the thinker with the strongest claim on it — free · no account needed.
In one line. 13 free lessons across 5 key topics — Reasons for the Cold War; early developments in the Cold War, 1945–49; the Cold War in the 1950s; Three crises: Berlin, Cuba and Czechoslovakia; the Thaw and moves towards Détente, 1963–72.
Often called the Cold War, superpower relations 1943–72, the origins of the Cold War — the specification's own title is above.
A depth study is examined through three questions on one option — a source impression, two effects, and a twelve- or sixteen-mark explanation or judgement.
The A world divided timeline — every dated event in the option, with why each one matters.
Beyond the specification: The Cold War — the story-first course behind this option, for curiosity rather than the exam.
The key topics
Key topic 1 · Reasons for the Cold War
'Who caused the Cold War' is the specification question, and the strongest answers do not pick a country — they pick a MECHANISM. Each side took defensive steps that were unambiguously threatening when read from the other side, and no step required bad faith to be alarming.
- Long-term rivalry and ideological difference — How much of Soviet suspicion of the West in 1945 was ideology, and how much was memory?
- Tehran, Yalta and Potsdam — What changed between February and July 1945 — Soviet behaviour, or the people in the room?
- The attitudes of Truman and Stalin — Can two governments produce a Cold War without either of them intending one?
Key topic 2 · Early developments in the Cold War, 1945–49
Berlin is the model for the whole Cold War: neither side wanted war, both used a method short of it, and the outcome was the opposite of what the initiator intended. Any answer about superpower crises that cannot explain why the airlift was a shrewd response has missed the pattern.
- The Truman Doctrine and the Marshall Plan — Was the offer of Marshall Aid to the USSR meant to be accepted?
- Bizonia and the Berlin Blockade — Why did a blockade intended to prevent a separate West German state produce one?
Key topic 3 · The Cold War in the 1950s
Peaceful coexistence and the invasion of Hungary are the same policy, not a contradiction: Khrushchev was offering to compete with the West without war while insisting that the bloc was not negotiable. The West's failure to intervene in 1956 confirmed that both sides agreed where the line was.
- Korea and the Warsaw Pact — How did a procedural absence turn a civil war in Korea into a United Nations operation?
- De-Stalinisation, Nagy and the Hungarian Rising — Why did the USSR accept Gomułka's reforms in Poland and destroy Nagy's in Hungary in the same month?
- The nuclear arms race — Why did a missile gap that ran in America's favour dominate American politics?
Key topic 4 · Three crises: Berlin, Cuba and Czechoslovakia
All three crises were resolved by the same unspoken rule — each superpower may do what it likes inside its own sphere and neither will fight over it. Détente is not a change of heart afterwards; it is that rule being written down.
- The U2 incident and the Berlin Wall — Why did the West protest about the Wall and do nothing, and what does that tell us?
- The Bay of Pigs and the Cuban Missile Crisis — If the crisis ended in a trade, why was it presented as a Soviet climbdown?
- Czechoslovakia 1968 and the Brezhnev Doctrine — Why was Dubček invaded when, unlike Nagy, he never proposed leaving the Warsaw Pact?
Key topic 5 · The Thaw and moves towards Détente, 1963–72
Détente's limit is visible in 1972 itself: SALT I capped launchers and left MIRV untouched, so the number of warheads rose throughout the era of arms control. A question asking how far Détente ended the Cold War is answered by that one technical fact.
- The Hotline and the treaties of 1963–68 — What do you call an agreement that limits how a competition is run without reducing it?
- Reasons for Détente, SALT I, and its extent by 1972 — How can an arms-control treaty be signed and the number of warheads rise faster than before?
Exam practice
14 authored exam-style questions on A world divided: superpower relations, 1943–72 — the three question shapes this option is examined with, at their real tariffs, each with the specification statement it assesses. Exam Ready marks them on Incandio against the real structural caps.