I google "Dunning-Kruger effect - Youtube" and got this excellent video made in 2016...
That puts me in mind of Bertrand Russell and Edith Sitwell.
How so?
Bertrand Russell:
The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt
Edith Sitwell: I am patient with stupidity but not with those who are proud of it
@anglophone * [en.m.wikipedia.org]
These are Cipolla's five fundamental laws of stupidity:
Corollary: a stupid person is more dangerous than a pillager.
I'm not sure where that puts Sitwell?
@FrayedBear Sitwell would be tolerating (or not!) the corollaries to those laws.