The time between the founding of the eu and now is the longest Europe has ever been without two major powers at war. Europe was basically the middle east version 0.5.
I'm assuming you caught the bit about "millions cast into slavery in North and South America". A legacy which still lives on.
Much of the stability of North America is built on that slavery (and the 100-million or so lives it cost), genocide of the original inhabitants (another mass killing of as many as 100 million), and of course, the protective moat of thousands of miles of ocean east and west.
Europe's own most stable polities are also shielded by water (Britain) and/or terrain (Scandinavia).
America is extremely stable compared to Europe.
The time between the founding of the eu and now is the longest Europe has ever been without two major powers at war. Europe was basically the middle east version 0.5.