
“Great necessities call forth great leaders.”
This seems to first appear in Why Leaders Can't Lead : The Unconscious Conspiracy Continues (1989) by Warren G. Bennis, p. 159, where it is cited as being from a letter to Thomas Jefferson, but it might be a misquote of "Great necessities call out great virtues" stated in a letter to her son John Quincy Adams (19 January 1780)
Disputed