Magic is a central part of life in most of Earthsea, with the exception of the Kargish lands, where it is banned. There are weather workers on ships, fixers who repair boats and buildings, entertainers, and court sorcerers. Magic is an inborn talent which can be developed with training. The most gifted are sent to the school on Roke, where, if their skill and their discipline prove sufficient, they can become staff-carrying wizards. A strong theme of the stories is the connection between power and responsibility. There is often a Taoist message: "good" wizardry tries to be in harmony with the world, while "bad" wizardry, such as necromancy, can lead to an upsetting of the "balance" and threaten catastrophe. While the dragons are more powerful, they act instinctively to preserve the balance. Only humans pose a threat to it.