the walking dead
In Volume 17, ricks group has been threaten by a group called the savoirs. ricks group thought they were safe only until some of his group started getting killed. the savoirs are a cold corrupt group that kill when they want and they force ricks group to do what they want or they die.
The zombies are a metaphor for the corruption of the government in your society because the government failed to let the people know about the zombies and it shows that the government tried to hide it.
Negan is the definition of a corrupted person that accepts it.
Negan is a metaphor for a loss of humanity because he is put in the spot of kill or be killed, but he will just kill anything that he wants to because that is what he thinks is right.