To what extent did ideological differences cause the outbreak of Cold War? The outbreak of Cold War was caused by ideological differences. United States of America (USA) and Soviet Union (USSR) both had very different ideologies with USA using democracy while USSR followed communism. Under a communist rule, USSR had only one political party which controlled all aspects of the government. The people had no choice but to accept the policies implemented. Capitalist on the other hand, had a democratic government that gave the people their “voice” by allowing them to vote for what they wanted. USA feared that communism would take over the entire world, just like how USSR took over Eastern Europe. USA also feared communism because USSR had plans to expand and take over the entire world. These intentions of USSR were found out by George Kennan who sent the Long Telegram that stated USSR’s expansionist intentions and suggested implementing a “Containment Policy”. This difference in ideologies caused both countries to wanted to Mutual distrust between the two countries was another reason why the Cold War was started. Both countries always had their suspicions about the other, dating back all the way to when Communism first took over USSR in 1917. This created fear in the West because they were afraid that Communism would be a threat to their democratic government. Mutual distrust was continuously built across different events such as USSR’s fear of the USA’s atomic bomb. USSR was not informed by USA that they would be using the atomic bomb in Nagasaki and Hiroshima, causing USSR to be wary about USA’s intentions of using the atomic bomb. This led to a deadly arms race which both countries aimed to create the most powerful bomb. Stalin’s insecurities about USA led to create satellite states, which eventually formed an iron curtain that acted as a buffer zone should USSR come under attack from the West. This attempt at enhancing security was seen as expansionistic from the USA’s point of view which the USA retaliated by introducing the “Containment Policy” that aimed to contain USSR’s communist expansionistic plans. This mutual distrust between the two countries continued to drive a wedge between the two countries which resulted in more hostile relations to continue. The Cold War was also caused by the breakdown of wartime alliances between USA and USSR. During World War 2, USA and USSR were alliances as they both fought against the same enemy: Germany. Before the war, USA’s suspicions grew when USSR agreed to sign the Nazi-Soviet Pact with Germany. Prior to that, USSR was also not invited to attend the Munich Agreement. That already caused already strained tensions to be weakened even more. Furthermore, during the war, Stalin felt that Western powers were delaying invading France, causing USSR to lose a lot of resources and men. USSR also agreed with USA that they would enter the Asia-Pacific War no more than 3 months after the European War ended. In return for this, USA would grant special territorial concessions for USSR. However, when USSR entered the war against Japan, USA was in the midst of dropping 2 atomic bombs on Hiroshima and Nagasaki, rendering USSR’s aid useless. Hence, from Truman’s perspective, USSR had no rights to collect their “reward” because they did not contribute to the war against Japan. However, Stalin still wanted to collect his “reward” for joining the war. This caused much stronger tensions between the 2 superpowers then eventually led to the start of the Cold War because their “alliance” had been destroyed. In conclusion, the Cold War was caused not only because of different ideologies but also because of mutual distrust and breakdown of wartime alliance alike. Among the three factors, mutual distrust between USA and USSR contributed to starting the Cold War the most because without this mutual distrust, USA and USSR would not become increasingly suspicious of each other that created the strained tensions between them.