The Walking Dead is about transformations of people after the world changes forever. Almost every one is dead, or Walking Dead, after a zombie sickness infects most of the human population. The story line follows a handful of people who have so far managed to remain human and fend off zombies in order to survive.
It’s what they have to do in order to survive, and how they alter their way of thinking about the world and each other, that makes The Walking Dead such a great story. The main character is Rick, formerly a police officer, and we follow him through tough choices, family dramas, and his complex role as leader of the small pack of survivors. His story is interesting because as group leader he feels compelled to make much more drastic choices than the others.
Not only does Rick have to change the way he sees the world, just like everyone else does, but he gets criticized for it by the people in his group. Since he’s in the leadership role, he’s subject to everyone’s judgement, even his wife’s. So The Walking Dead is about zombies but also about leaders vs. followers, human nature, and society as a whole.