The point about capitalism isn't really accurate. Communism had the same problem. It's more about greed and power, and a system that sustains it than about the ideology behind it, I think. However, their ideological opposites, anarchism and liberitarianism, offer false ways out, too, as humanity is simply not capable of sustaining that.

I'm sounding a bit like a broken record, but the only political system with a proven track record in modern society is still social democracy: educate the people so they don't bash each other's heads in, distribute wealth and power better, and regulate the markets. It unfortunately died through the unholy matrimony of material well-being and social media.