World War Z
How we cite our quotes:
That is the nature of human warfare, two sides trying to push the other past its limit of endurance, and no matter how much we like to talk about total war, that limit is always there… unless you're the living dead. (8.1.13)
In conclusion, something that sums up warfare in World War Z and quite a few other novels: war is about the limits of what people can do and what they can endure, whether it's the good, the bad, or the zombie.