The Great War was a symptom, not a cause. These Western democracies have all broken down for the simple reason that democracy as it has been peddled to the masses for the last 150 years doesn’t work.
That’s because the democracy so peddled is in fact Marxism.
You’re probably correct.
If you read Rudyard Kipling’s “Gods of the Copybook Headings”, published in 1919, it’s fairly obvious something was going horribly wrong, even without the war.
People the world over took to praising the virtues of Democracy as a formal system and didn’t tend to their own development in virtue — or at least, people took the question of virtue off the table with windbaggery about Our Rights while they attended to their development in Lord-only-knows-what self-indulgent junk.