Please no Ben Shapiro videos :P
Copernicus vs. the Ptolemaic system of astronomy?
Most recent scientific paradigm shifts, like Einstein vs. Newtonian physics, aren't really "brutal" since the previous system survives as a limiting case for moderate energies.
Wegener's refutation of the theory that the continents were fixed wasn't forceful enough. He proposed plate tectonics in 1915, but it wasn't widely accepted until the 1960s. https://en.wikipedia.org/wiki/Plate_tectonics#Development_of....
I was reading him this morning and, although elegant and eloquent, he is "brutal". (I'm thinking of Brutalist architecture more than raw violence.)
The velocity of light in a vacuum is fixed.
The laws of physics are the same from every (inertial framework) viewpoint.
Ergo, from just those two ideas, everything we thought we knew as fundamental truths about time and space was wrong and the real world is stranger than anyone ever guessed.
Yah, it's brutal.
The church thought the earth was the center of the galaxy and some dude proved them wrong.
A lot of medical stuff.
I’m just shotgunning here Incase no one else gives an answer