What was the main cause of the cold war?

The stockpilling of nuclear weapons by the united states
Ideological differences between western and eastern
eropean countries
The bay of pigs incident in cuba
The fall of the berlin wall

The main cause of the Cold War was the ideological differences between Western and Eastern European countries. The United States and its Western allies advocated for democracy, capitalism, and individual rights, while the Soviet Union and its Eastern Bloc allies promoted communism, planned economies, and collective rights. These conflicting ideologies led to a power struggle and competition for influence and control around the world, which characterized the Cold War. The other factors mentioned, such as the stockpiling of nuclear weapons, the Bay of Pigs incident in Cuba, and the fall of the Berlin Wall, were significant events and consequences of the Cold War but not its main cause.