Communism has never been implemented. You're unaware of what communism is, so how would you know anyways? Social Democracy Isn't on the left side of the spectrum. There's no such thing as a leftist that supports capitalism. Capitalism does not work without exploitation.

China is working towards communism, and the USSR made huge progress, all while at war with the west the entire time.

I'm busy reading and can't be bothered to continue this conversation. Later.