It took a lot of effort, but Japan's Meiji Era civil war was a big one.
The Samurai Class said: "This system is not good, and look over there, battleships from Western Nations are on our shore. Time to modernize and industrialize, and time to retire the Samurai system".
Of course, the other half of the Samurai argued otherwise and thus the civil war started. Turns out that the side that chose guns and industrialization won.
----------
Arguably, every revolution and civil war was basically a group deciding that the old way was bad and that some new way was better. But the Meiji Restoration is perhaps the most striking example in the past 200 years.
Yes, the "schism" happened as per the blogpost. But the schism was fixed and Japan was reunited, fighting as a united front in the Russo-Japanese war... proving that Japan had in fact become a modern world power.