"World War Z" [1] -- the book, not the movie -- is based on the premise that people would work together to ultimately overcome the zombie plague. Notably, Max Brooks wrote "The Zombie Survival Guide" [2] before he wrote "World War Z".
The Survival Guide is really good. It nicely uses an american guidebook form
to define which zombie variant is present in this world (unlike too common and
inelegant "now, Computer, tell me all about The Century War", replied with
a lecture ended with "...but you should already know all this, because you
were in The Academy"), and if you strip the zombies and guns from the book
altogether, you get a sensible guidebook on how to prepare for surviving
a disaster.
Was really disappointed that the movie had nothing to do with the book. I think they just wanted the name. The book comes across as more of a comedy, though. Sending in little dogs to get zombies out of tunnels? Pretty funny stuff.
[1] https://en.wikipedia.org/wiki/World_War_Z
[2] https://en.wikipedia.org/wiki/The_Zombie_Survival_Guide