Why are Zombies Popular

I think one of the main reasons zombies are so popular is because of the fact that zombies are a satire of human civilization. One point that zombie movies always make is that people try to ignore the zombies and try to go about there live ignoring the problem. But in the end there is always a domino effect of events that leads to the zombies breaking into the human stronghold. Also in later years today zombies have become popular threw pop culture such as video games and big budget moives.