Harper Lee has remained famously detached from interpreting the novel since the mid-1960s. However, she gave some insight into her themes when, in a rare letter to the editor, she wrote in response to the passionate reaction her book caused: "Surely it is plain to the simplest intelligence that To Kill a Mockingbird spells out in words of seldom more than two syllables a code of honor and conduct, Christian in its ethic, that is the heritage of all Southerners."
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): According to Lee, her book simply expressed a Christian code of honor and conduct inherit to whom?
all Southerners