I was implying nothing about any other type of societal organization. However, since you mention it, I will point out that Capitalism (which is an economic, not political philosophy) can become horrific for the same reasons Communism becomes horrific - People. Communism was a response to naked, mercantilist Capitalism. Marx's heart was in the right place, but he was describing a Utopia.

I think Democracy (in its many forms) designed with checks and balances is a viable answer to the problem. It ain't magic, though. People still need to ensure it remains balanced. We've been having some trouble with that lately. It took fifty years of planning for the authoritarians to get us here. It's a good sign it was so difficult, but now we have to work hard to fix the mess.