Who Was to Blame for the Cold War? IGCSE History 0470 Guide
'Who was to blame for the Cold War?' is not a request for the longest possible list of post-war events. It is a judgement about the breakdown of cooperation after the Second World War. A strong IGCSE History answer needs evidence for competing interpretations before choosing which is more convincing.
Begin with the breakdown of wartime cooperation
The United States and the Soviet Union had fought a common enemy, but their political systems, security concerns and plans for post-war Europe differed sharply. The central problem was that measures one side saw as defensive could look aggressive to the other.
Explain that tension before memorising individual crises. It helps connect Yalta and Potsdam, changes in Eastern Europe, US economic aid and the Berlin confrontation into a sequence rather than a disconnected timeline.
The case against the Soviet Union
One argument emphasises Soviet influence over Eastern European governments and pressure against political opponents. To supporters of this interpretation, the expanding Soviet sphere appeared to undermine the possibility of independent choices in countries liberated from Nazi control.
In an exam answer, say why a specific action increased Western distrust. 'Stalin controlled Eastern Europe' by itself is a description. The explanation is how political control raised fears of further expansion and provoked a response.
The case against the United States
An alternative explanation highlights American economic and strategic power, the Truman Doctrine and the Marshall Plan. From Moscow's perspective, American-led initiatives could look like attempts to contain Soviet influence and pull Europe into a US-dominated system.
Do not treat this as proof that one side was automatically right. Show why the same event could be interpreted as protection by one government and as a threat by another.
Shared responsibility and the Berlin Blockade
Germany and Berlin exposed the clash clearly. Disagreements over the occupation zones, political rebuilding and currency arrangements deepened mistrust. The Berlin Blockade and Western airlift made the division of Europe highly visible.
A balanced answer can distinguish long-term ideological conflict from the immediate decisions that made cooperation impossible. That distinction is often more persuasive than saying both sides were 'equally to blame' without evidence.
Structure a ten-mark judgement
Write one developed paragraph explaining Soviet responsibility, another considering US responsibility, and then weigh their relative significance. Which side made the decisive choices? Which was responding to a perceived threat? Tie your answer to the period asked about.
Use EIE's dedicated Cold War origins notes to check chronology and named evidence, then its Paper 1 marking guide to test whether your answer actually explains and evaluates.
Continue revising with EIE
Read the syllabus-mapped material for the exact topic, then test your understanding. Use the linked practice resources where available and keep a short record of what you need to revisit.

