I have based my claim that the world of Science was totally upended during WWII by pointing out that Science circa 1940 valued purity above all else while today's science values diversity above all else and that these two values oppose each other in every possible way.
I am not limiting myself to shallow definitions either : not just to yesterday's eugenic notions of racial purity versus today's natural biodiversity and civil rights supported human social diversity.
I mean that the scientific theories that won near universal support before 1940, regardless of the often tiny amount of physical evidence supporting them, all tended to exalt the pure --- ie the simple, the linear, the stable, the symmetrical and systems in equilibrium in their visions of Reality.
So if Reality was really as simple, stable, consistent, understandable and predictable as these theories claimed, then we could indeed see into the Future and pick the one simple 'right' answer to solve all possible of today's and tomorrow's problems.
We could thus safely and sharply purify and reduce the world's gene pool - by picking the single best corn species and discarding all the second best, for example - confident that nothing could ever go wrong.
Simply pure and definite certitudes for a purely simple certain world.
But then, just for an example, in 1970 America's most important industrial material (their corn crop) was almost all wiped out by a fungus that was finely tuned into killing only this high yielding monoculture crop.
Suddenly even the Koch Brothers of this world could see the virtues in gathering and protecting all the bio-diversity found in the many ancient and hitherto 'useless' variants of corn, just to cover all bets in what was suddenly looking to be a world of highly diverse dangers....