system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Capitalism vs. Communism during the Cold War, why does America care so much how other countries are run?

It's been a few years since high school. I understand the Cold War and Vietnam Conflict existed because of the spread of Communism, but I still don't understand why America was so threatened by a different ideological view.
gpt
It was less about ideology and more about rivalry.

The US and the USSR were struggling for global dominance.  Since communism and capitalism were largely incompatible, they were useful tools to force countries to pick one side or the other, and to stay on that side once it was picked.

If instead of Russia, communism had taken hold in say, Greece or Argentina, the US probably wouldn't have cared nearly as much.