No one will say (although click here for my colleague Adam Vary's theory on why he should die) but Lewis thinks the appeal of the series is how the writers toy with this genre's expectations.
If her talk of ethics sounds fluffy, recall that in 1759 Adam Smith earned his reputation by publishing "The Theory of Moral Sentiments, " in which he accounted for the emergence of sympathy and moral judgments.
In his 1759 book the "Theory of the Moral Sentiments, " philosopher Adam Smith argued that empathy (he called it sympathy) was motivated by the capacity to imagine being another person.