If the Almighty were to rebuild the world and asked me for advice, I would have English Channels round every country. And the atmosphere would be such that anything which attempted to fly would be set on fire.
If the human race wishes to have a prolonged and indefinite period of material prosperity, they have only got to behave in a peaceful and helpful way toward one another.
If you have an important point to make, don't try to be subtle or clever. Use a pile driver. Hit the point once. Then come back and hit it again. Then hit it a third time - a tremendous whack.