While doing some research on "wisdom", I came across this statement by Robert Sternberg on a web article: "I looked at people like Gandhi and Martin Luther King, Jr., and Mother Teresa and Nelson Mandela – take your own pick – and if you compare them to Stalin and Hitler and Mao, they probably didn’t differ much in I.Q. It seemed that what differentiated them was wisdom".
I need to know where I can find the origin of this statement / how to cite it.
Thank you