You have massive selection bias in your sample. “Morally-based decision ends well” is not exactly something that makes headlines or that is seized upon by historians to explain memorable cataclysmic events.
You don’t need to be an ethics expert to see a difference between moral principles that lead to suffering, and moral principles that don’t.
Waving away all morality in moral nihilism is teenage-level ethical sophistication.
Name one non-capitalistic system more moral than the currently existing ones.
All rankings trying to quantify morality and order societies by it, are consistently topped by social market economies, a form of capitalism.
> Waving away all morality in moral nihilism is teenage-level ethical sophistication.
It is also something I have never done. With the edits to your post, its nature became more and more apologetic to dictatorships. I hope this was not what you have intended.
What are you talking about?(!)