“[T]he fact that I consider charity to be above and beyond the call of duty does not mean that I am unwilling to give. I go above and beyond the call of duty every day. I aspire to moral excellence. Millions of people around the world suffer through no fault of their own. I have plenty of resources to help them, so I am glad to help. As an economist, of course, I don’t just want to express good intentions; I want my donation to do as much good as possible.”

— Bryan Caplan, A Supererogatory Provision