Mad Mad King 
A powerful sorcerer, with the intent to destroy a kingdom, to a magic potion in the well where they drank all the subjects. Anyone who touched that water would become crazy.
The next morning, the entire population went to the well to drink. Everyone went wild, except the king, who had a private well for himself and his family, to which the wizard failed to arrive. Worried, the king attempted to exercise its authority over the population, enacting a series of security laws and public health. The policemen and inspectors, who drank the poisoned water, they found absurd the real decisions and decided not to follow them. When the inhabitants of the kingdom
learned the text of the decisions, were convinced that the king had gone mad, and therefore ordered things meaningless. Screaming, they went to the castle, demanding the abdication. Desperate
the king declared himself ready to leave the throne, but the queen stopped him and suggested: "Let's go and drink that water source. In this way, we will be equal to them." And so they did: the king and the queen drank the water from the madness and immediately began to say things without meaning. Meanwhile, subjects repented: now that the king showed much wisdom, why not allow him to continue to govern?
The calm reigned again in the country, although its inhabitants behaved in a completely different way from their neighbors. And so the king could govern until the end of his days.
Paulo Coelho, Veronika Decides to Die
