Entropy of information always decreases in a closed system unless work is done on the system to increase it. I know it's hard to believe, but if you think about it you'll realize it to be true. In the long run, information always becomes more organized. Just like the 2nd law of thermodynamics, this law has no proof, but an observation of history demonstrates that the 2nd law of infodynamics is true. An obvious counter example might be the dark ages. In the most general sense, it is evident that energy was spent (i.e. work was done) on that society, either through acts of man (i.e. warfare, politics) or nature (i.e. natural disasters, weather), causing it to become disorganized.