One of the main reasons why tensions rose between the united states and russia was because of their completely different economy. The united states is capitalist meaning that the government could not get involved in the economy whereas socialism/communism in russia was where the government had control over the manufacturing. This led to tensions between the two parties trying to prove which economy was better but they only ended up spying on each other. Like the guy above me said, it was called the cold war because neither the U.S or russia had declared war on each other.
