Coincidentally, these days I'm reading a book by Lorenzo Infantino titled Ignorance and Freedom (I’m really reading the Spanish translation of the original in Italian), which sustains this interesting idea: ignorance (= the conscience of our fallibility) is the true foundation of democracy, free market and scientific thought. Right now, I'm thinking this is probably one of the real foundations of the whole life (we are always exposed to be wrong), being our worst enemy any position which claims any kind of “privileged knowledge about the world”.
P.S.: That said, I'll need to explain my avatar some day.

Yes. Awareness of our own ignorance is the beginning of wisdom. True democracy, with the power of individuals constrained by the rule of law, is the political expression of that awareness. Free trade is the economic expression of it. Science is the intellectual expression of it.
The delusion that we know what's best for ourselves -- let alone for other people -- causes much needless suffering in our world ... especially when our arrogance is so great that we believe we're entitled to violate others' rights and force them to do our will, "for their own good."
Sadly, history shows that not only are we slow learners, but we quickly forget what we've learned, and thus take for granted what's been hard-won by the blood of our forebears.