In terms of providing value to others, marginal charity is extremely efficient. It does a substantial amount of good for others at very little cost to oneself. (In other words, it has an incredible ROD.) But at the same time, marginal charity utterly fails as a way to advertise good qualities. First of all, there’s no way to demonstrate to others that you’ve engaged in an act of marginal charity; it’s almost perfectly invisible. Second, it’s extremely analytical. Instead of showcasing your spontaneous compassion, it showcases your facility with abstract economic principles. For these reasons,
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