Justin D'Arms is a contemporary American philosopher at Ohio State University specializing in metaethics and the philosophy of emotion. He is best known for defending sentimentalism — the view that moral and evaluative concepts are to be understood in terms of the fittingness of emotional responses. His collaborative work with Daniel Jacobson on the 'resonance' model of emotional evaluation has been influential in debates about the relationship between affect and ethical judgment.
Developed a fitting-attitude sentimentalist account linking moral wrongness to the fittingness of reactive emotions such as resentment
Co-authored influential work with Daniel Jacobson distinguishing moral from merely prudential criticism of emotions
Advanced the 'resonance' model of emotional evaluation in metaethics
Contributed to debates on the autonomy of ethics from evolutionary debunking arguments
Applied sentimentalist frameworks to humor, shame, and other non-moral evaluative domains