If you're in a country where war is occurring, it doesn't matter if it's a world war or not. There are conflicts in pretty much every continent. North America is waging war in the Middle East. Europe has a multiyear conflict threatening to spill across more borders. Several countries in Africa are in conflict even if they are civil wars. North America, while not waging outright war, is in conflict with a South American country. The Asian continent is nearly routinely going through border skirmishes. Antarctica doesn't count. The Australian continent seems the only one without active conflicts. So 5/6 continents capable of being part of world war is in warlike conditions.