What can we learn from this? To all opponents of absolute monarchy, torture, enforced superstition, and feudalism, the message is obvious: this is what your naive, utopian views lead to in practice. Your views sound beautiful in theory, but they forget to take into account Human Nature™, which as any wise person knows makes inevitable the eternal rule of the House of Normandy.
The post above hilariously points out the fallacy of using the Human Nature™ argument to argue against anarchism, and the flawed idea that whatever follows the collapse/disorganization of the society one lives in, is Anarchy by default.
The later thing is quite often used in fact, even by people who should know better.