The "proven track record" part of your question is shortsighted. We shouldn't restrict future political thought by past political thoughts. We'd never see any progress that way.

If you're asking which one of the three I think we should focus our attention for change, I think the obvious answer from both a moral and logical standpoint is capitalism. The combination of democracy and free speech means money is political power. Allowing individuals to amass this much political power is both unjust and destabilizing. That goes for companies as well. If companies are going to be amorally motivated purely by money, we need to do a better job of pricing in externalities to put reins on that amorality.

Someone smarter than me can weight on this part, but I don't think it was/is capitalism per se. Moving off the gold standard, and allowing the Dodge Brothers to win the case saying stock holders were more important than paying workers were a 1-2 gut punch to capitalism. I don't believe our forefathers would be very proud of us if they saw this mess.

Capitalism is an extension of nature. Nature can be cruel, but it's still nature.

Blaming capitalism for what's happening in America is like blaming an engine for a car not having seatbelts.

No. Anarchism is an extension of nature, and a better analogy would be blaming an engine for only Rolls Royces having seatbelts.

Dodge v. Ford was both a landmark case and a very narrow excuse that holds no jurisdiction outside of Massachusetts. I hope someone challenges it one day, but it seems like any potential challengers benefit from pretending it's precedent.