The “Butterfly Effect” is a valid concept whereby a small change to initial conditions in complex systems can lead to huge changes later on. The thought-experiment is that a butterfly flapping its wings in one location can, over time, lead to very different weather in a far distant location, as compared to if the butterfly had not flapped its wings. This term initially arose when an early experiment in weather simulation models showed a vastly different outcome when the simulation was restarted with values whose changes were below anything that could be measured at the time in reality — thus showing that effects too small to detect can magnify.
The “Mandela Effect”, on the other hand, is a fetid pile of dingo’s kidneys that is a fancy way of noting human memory is fallible and that false memories are reinforced through repetition. The human brain has a bad case of “sunk cost” fallacy, and rather than admit to itself it has been remembering something incorrectly for decades, would rather believe in parallel universe intruding into daily life on a regular basis. (The human brain is also lazy, or if you prefer, “efficient”, so it merges similar memories together, thus freeing up some storage space for other things and improving search time. For most of our actual needs, “close enough” works; it doesn’t matter that Kirk never actually said “Beam me up, Scotty” in the original series.)
You didn’t finish the question
During the Cold War, and in the past decade, U.S. policy often viewed nuclear weapons apart from the rest of the U.S. military establishment, with nuclear weapons serving to deter a global nuclear conflict with the Soviet Union or Russia.
I think It was The National Road
"The Dialectic of Christianity" first appeared in Culture in History, edited by Stanley Diamond, which was published by Columbia University Press in 1961, and is reprinted with their permission. "The Symbols of Folk Culture" is reprinted with the permission of the copyright holder, The Con- ference on Science, Philosophy and Religion in Their Relation to the Democratic Way of Life, Incorpo- rated, and was written for its thirteenth symposium volume, Symbols and Values: An Initial Study, pub- lished in New York City, in 1954. Acknowledgment is made to the American Folk- lore Society, Inc.