Just as characteristic, perhaps, is the intellectual interdependence created through the development of the modern media of communication: post, telegraph, telephone, and popular press.

Within each such social group, a feeling of solidarity prevails, a compelling need to work together and a joy in doing so that represent a high moral value.

All species capable of grasping this fact manage better in the struggle for existence than those which rely upon their own strength alone: the wolf, which hunts in a pack, has a greater chance of survival than the lion, which hunts alone.

Earlier ages fortified themselves behind the sovereign state, behind protectionism and militarism.

A pacifist will often - at least nowadays - be an internationalist and vice versa. But history shows us that a pacifist need not think internationally.

Hand in hand with nationalist economic isolationism, militarism struggles to maintain the sovereign state against the forward march of internationalism.

The main concept is that of an international solidarity expressed in practice through worldwide division of labor: free trade is the principal point in the program of internationalism.