Consider the present state of political discourse. Isn't it, at least in part, a discussion about evil and what to do about it? Of course, it also involves thinking about some things as evil and other things as good. But once a political group has decided what they think is evil, the debate is all about what to do about it. Debate over the environment is about what to do to confront the bad effects of successful economies. The debate over wealth and poverty becomes a debate about how to shrink the income gap. The same is true of debates over firearms, border control, the moral status of the unborn, and a plethora of other issues. What price utopia? What a politician has to do is attempt to restrain evil without removing other features of overweighing value. Good governance restrains evil without diminishing other valuable features of human life. Thus, to govern well, one must have a grasp of the nature of human beings. Indeed, any political philosophy begins with answering th...