One more thing, right at the beginning of DeWitt he says this about Epicurus: "The man himself was revered as an ethical father, a savior, and a god."
Think about that in the current context. It is an allusion to the whole topic of humans seeking to "deify" other humans. What motivation rests below that tendency? And, how does that bear on the larger discussion of piety? Both questions are worthy of discussion in the current context.