The last one came in "The Age of Aquarius," when everyone was about "peace, love, and rock n' roll" except for that war in Viet Nam. When kids could afford to go to some rinky dink little town in upstate New York for a three-day concert to get stoned, and go to college in the fall. They still planned "a better life for our kids," and went on to be the grandparents and great-grandparents of today. (Ha! I was 16 coming in on the end of it, but hubby, who wasn't hubby yet, already had a wife and daughter then. Now that daughter is a grandmother. lol)
The one before that came a decade before "The Great War."
I don't know how God works it, but horrific turmoil isn't a need.
(I already said I didn't think one is coming for a while, but you can take my word when it comes to choosing who won't win the next football game and strictly based on who I want to win. lol)