Dark Knight quote says it best.
Some people just want to see the world burn. Call them evil, call them sociopaths. You can't negotiate with these people. Chaos and destruction is their only motive. Many people died saying lets avoid war with Hitler or Saddam, lets try more peaceful channels.
The books are interesting, but way too basic, and scheming is an art that you have to practice, but its not a necessary science. I rarely feel the need to scheme, because I'm not surrounded by schemers, also there is not some prize I have to get by outmaneuvering someone.
Even I love Robert Greene's books, it was mostly for entertainment purposes. I found Dale Carnegie to be a better read than Sun Tzu, Machiavelli, and Robert Greene.