What was the ideology of American Cold War policies and practices the late 1940s to the mid-1950s?

The cold war ideology changed wartime alliances after WWII by bringing the two super powers, the United States and Russia, head to head on opposing sides even though during the war they were allies with a common enemy. During the war, both super powers were set against Nazi Germany, but they both had different ideas as to how the world should be ran afterwards and came to blows over it.

beryl1963