Explain Like I'm Five

The fundamental issue of socialism and why it doesn’t and has not worked historically is because of human nature. A corporateocracy or a capitalist based society aligns much better to human nature than socialism does which is why it’s significantly more “successful”.

Except the only major sovereign socialist experiments have been either crushed by non-economic forces, or been Soviet-style totalitarianism.

The idea that capitalism is more based on 'human nature' ignores why capitalism actually works. You could argue, with much more validity, I would say, that feudalism is more in-tune with human nature than capitalism, yet almost no one disputes that feudalism is worse than capitalism.