If you read the three articles it appears when the Roman Empire was strongest it was more peaceful for those within its borders (50 million people stretching fr

If you read the three articles it appears when the Roman Empire was strongest it was more peaceful for those within its borders (50 million people stretching from North Africa up through Europe and East through the Balkans) than it was before the empire (endemic warfare) or after the start of its decline (smaller, more frequent conflicts).