When all is Ocean

I have been looking at the map on the wall
Most of our world consists of salt water
In time to come when the sea level rises
Britain will be a rock that steadfastly refuses
To join EU, and that is ok, since most of
Europe will be under the sea.
The far and near east will consist of islets
And Swiss will have a seaport.
If you think this will bring peace, you are wrong
They will fight over religion and fishing rights
And threaten war.
This reminds me, I have to learn swimming.