WESTERN Europe—what we may call the Roman world—is an wessential unit. The nations that go to make it up share a common culture. They have no cause either to despise or to quarrel with other nations. Yet their first business is to preserve unity among themselves and to show a common front to the rest of the world. In unity lies their security, whereas, if they quarrel among themselves, the true victory goes neither to the one group nor to the other of quarrelling Europeans but to the tertius gaudens outside Europe who profits from their divisions.