Cold war has its own economic, plitical and military perspective which helped cold war to come to an existence. Firstly, the economic cause of cold war is when the united states wanted to encourage free trade throughout the world. The soviets, however, wanted to close themselves off from the world and international trade and solely benefit from its resources. these differences led to resentment between united states and the soviet union. Secondly the political cause of cold war is when the soviet government dislike the idea of promoting cappitalist sytem of government. Politically it can be said that the communist government is a type of government sytem where citizens does not enjoy the right of freedom of speech and press. Democracy is lacked in this type of government. Entirely soviets system of government acts an oposing idea towards the treaty of versailes and also towards the international relations.These two cotradictory ideas has braought about suspicious and tensions towards countries in the europe continent. As in military expansion, the two countries possessed in the installation of nuclear weapons. Soviet union was expanding its territory in the eastern europrean continent while the united states futher expands in the western continent. The eastern side practiced communism while the western side practiced cappitalist system of government. With these two front lines the two supperpowers intend to install nuclear weapons and particularly practiced nuclear arms race. The soviet unions felt fear of the American atomic bomb and the American fear of the communist attack.