You wanna know who lost World War Z? Whales. I guess they never really had a chance, not with several million hungry boat people and half the world's… - Max Brooks

Ignorance was the enemy. Lies and superstition, misinformation, disinformation. Sometimes, no information at all. Ignorance killed billions of people. Ignorance caused the Zombie War. Imagine if we had known then what we know now. Imagine if the undead virus had been as understood as, say, tuberculosis was. Imagine if the world’s citizens, or at least those charged with protecting those citizens, had known exactly what they were facing. Ignorance was the real enemy, and cold, hard facts were the weapons. (Page 194-195)

The Allies had the resources, industry, and logistics of an entire planet. The Axis, on the other hand, had to depend on what scant assets they could scrape up within their borders. This time we were the Axis.

The dead walk among us. Zombies, ghouls — no matter what their label — these somnambulists are the greatest threat to humanity, other than humanity itself.