How did the cold war between the united states and the soviet union grow out of world war 2

The alliance between the United States and the Soviet Union started to fade before the end of the Second World War. When the conflict ended, the Red Army occupied Eastern Europe, Western Europe was in ruins, and there was a threat of Russian domination on the whole continent looming. The Marshall Plan helped rebuild Western Europe, but American apprehension and distrust of Soviet intentions remained high. Other events that contributed to the beginning of the Cold War were the Communist coup in Czechoslovakia and the Soviet blockade of Berlin in 1948, the fall of China in Communist hands in 1949, the Soviet atomic bomb of 1949, and Soviet support for North Korea´s invasion of its neighbor South Korea in 1950.

Explanation:

the West as a civilization (elites the West) felt threatened by communism a long time before WW II started. When Bolshevik revolution took place (1917) international communist started expanding all over the world. World-wide population was seized by the image of final apocalyptic conflict betwen bourgeoisie (Christian values, western traditions, capitalism) and barbarian Commmunism. All that was based on Marx´s "scientific" prophecy of apocalyptic conflict between two irreconciliable forces of decadent bourgeoisie and progressive proletariat. Mutual animosity existed (even though only theoretical because worldwide Communist revolution never ocurred) also during WW II. The conflict was there. GB and USA collaborated with USSR militarily and politically but it does not mean they adopted Communism or became permissive towards it. After the WW II what we call "division of power" took place USSR required its part in international policy and had its geopolitical and ideological influence (USA and GB and all the West accepted thatthey had to because after the WW II USSR became extremely popular). Soviet ambitions in world politics were naturalcourse of event seemed to confirm Communist "scientific" historiography and the thesis that history sides with USSR.

Explanation: USSR profited from Communist revolution (1917) and its role in WW II especially in 1950s. But situation started to change in 1953 (Stalin´s death and condemnation of its policy by Khruchev), in 1956 (anti-soviet uprising in Hungary) and in 1968 (Prague Spring in Czechoslovakia). Immediately after 1945 USSR was extremely popular (in Europe, in Latin America as well, Africans were inspired by Russians in their fight for independence and decolonization).

by 1890, the united states had by far the world's most productive economy. american industry produced twice as much as its closest competitor--britain. but the united states was not a great military or diplomatic power. its army numbered less than 30,000 troops, and its navy had only about 10,000 seamen. britain's army was five times the size of its american counterpart, and its navy was ten times bigger. the united states' military was small because the country was situated between two large oceans and was surrounded by weak or friendly nations. it faced no serious military threats and had little interest in asserting military power overseas.