Certainly, for all the wars and turmoils that accompany the history of civilization, there have been eras of peace and harmony throughout the history of civilization.
Narrowing the history down to the later and more advanced eras of technology, to what may be the finest hour of civilization anywhere - the finest fleeting moment, acknowledging its flaws, may have been those two decades in the United States and Europe, between the end of World War II, in 1945, and the generalized beginning of the Vietnam War, in 1965 (which started earlier but didn’t get into full swing until ‘65).
Is it unlikely that the world ever saw anything like it before? Is it just as unlikely that the world will ever see anything like it again?
Any further thoughts on this consideration?