Groundbreaking

Most of the "Art of War" isn't groundbreaking. And wasn't groundbreaking at the time. It was and is however a great compendium of ways to make your enemies hate you even more and is generally considered more effective than sticking out your tongue at them and saying "Nah, nah, na, nah, naah". Also, it was so that you could make better plans on the battlefield than: Step one, have enemy. Step two, have weapon. Step three,. Step four, win!!