Many scholars/politicians/historians of the era also made the same sort of technology/globalism arguments against the possibility of war, so the point still stands that the arguments are fundamentally similar. And yes Europe had been warring for years but Europe's economies and societies had become so intertwined many thought war was impossible. You didn't even need a passport to travel anywhere in Europe save Russia. Again, read the history. Technology and globalism (the two reasons you cited to prevent a major war), sure haven't prevented them in the past.
well, i want you to take a look at how many countries with McDs in them have had a war against one another. The answer is zero. How many McD type places were present in europe at the time in question? You're talking about a time before corporations became empires. its apples and oranges really.
The McDonalds peace theory?
While those sorts of international corporations didn't exist at the time, the level of integration of European countries at the time was more extensive than many realize and roughly comparable to the early days of the EC. I don't the the lack or presence of international corporations really helps or hurts the analogy significantly.
But back to the McD's point (and I'm not being sarcastic because you're making a valid point): I would argue it's more because those countries simply haven't had any reason to go to war, rather than the presence of international corporations preventing war. Just because a test case doesn't exist doesn't mean it can't happen. I'd say the same thing about democratic peace theory, which the Bush administration strongly embraces.
You do have a point that major war today comes with many more risks than in the past...but for a different reason than those cited -- nuclear weapons. But even nuclear deterrence has its limits, I think. I have little doubt that China would invade Taiwan if it had the chance (the CCP's entire legitimacy is staked on reunification). I think that overwhelming national interest will override any consideration for the cost of war. That's probably the most likely scenario for a major war in the future, because the United States -- whether in Democratic or Republican hands -- wouldn't abandon Taiwan (unless there's a tectonic shift in American politics).