So that protection aspect. But also, you have an endless food supply, right? Japan relies on fish and the ocean in order to feed itself. It has a very small, rocky kind of geography. So they're not going to be growing too much food and they're not going to have too much cattle so the ocean is going to basically be there for them. So the ocean can be a great example and a very easy one to argue that it creates a lack of cultural diffusion, but at the same time it protects you from invasion. So hang your hat on that one right there.