According to calpurnia who was the meanest mam god ever blew breath into

Mr. Nathan Radley

Explanation:

The question above is related to the novel, "To Kill a Mockingbird" by Harper Lee. It tackles on the issue of racial discrimination in order to provide awareness to readers.

Calpurnia is one of the characters in the novel. She's black and has been serving the Finch family for quite a long time. She took so many roles of being the caregiver of the Finch children. She nurtured them and also took the roles of cleaning and cooking for the family.

Mr. Nathan Radley is the brother of Boo Radley. He became in charge of the house when Mr. Radley died. His character is a little cold and secluded. He wasn't really warm to the children and he could just shoot anything passing by his yard with a shotgun.

Such character made Calpurnia describe Mr. Nathan Radley as the meanest man in the world.