1. The Second World War had been fought on the principles of peace, democracy and freedom of nations in contrast to the Nazi ideas of dictatorship and imperialism. 

2. After the war colonial powers like Britain and France could no longer justify their old colonial powers exclusive access to the colonies. 

3. In fact, Second World War helped the USA grow out of its economic misery caused by the great depression. 

4. Far from War theatres, the industries and agriculture of the USA prospered. 

5. The USSR coming out of its destruction was emerging as a Champion of anticolonial struggle. 

6. In the post-war period the USA and the USSR have emerged as super powers. 

7. The USA is the leader of the capitalist nations and the USSR is the leader of the communist nations.

(OR)

After the Second World War, the major shift in power is observed between two power blocs of USA and USSR.

1. The USA led an Anti – communist bloc based on capitalistic principles. It tried to prevent other countries from adopting communism. 

2. The USSR led a communist bloc. It tried to bring other countries into its communist influence. 

3. Both USA and USSR tried to expand their ideologies and check each other, resulted in the situation of cold war. 

4. Newly independent countries formed an alliance called NAM that stood independently in international aspects away from both military blocs.