The tax code allows taxpayers to deduct amounts donated to an extremely broad variety of organizations deemed to create societal benefits — that is, positive externalities. But many organizations that may receive tax-deductible contributions also cause harms. Both the tax code and subsidy theory, one of the most utilized scholarly theories developed to analyze the deduction from an economic and morally neutral perspective, fail to properly account for these negative externalities. In order to do so, one needs to look beyond the economic models utilized by subsidy theorists. For instance, there should be some limit to the types of harms organizations can cause while retaining their subsidy (that is, their ability to receive deductible contri...