Respectfully Quoted: A Dictionary of Quotations. 1989.
Arnold Joseph Toynbee (18891975)
Now civilizations, I believe, come to birth and proceed to grow by successfully responding to successive challenges. They break down and go to pieces if and when a challenge confronts them which they fail to meet.
ARNOLD J. TOYNBEE, Civilization on Trial, chapter 4, p. 56 (1948).