Technically, it would be World War IV, as many historians agree that the Napoleonic Era produced the first world-wide war, as conflict visited most of the planet.
Anyway, here's more:
"War is irrational; its only plan is to bring destruction: it seeks to grow by destroying," he said. "Greed, intolerance, the lust for power. These motives underlie the decision to go to war and they are too often justified by an ideology ...," he said.