Duty, Detachment, and Moral Worth: A Comparative Study of the Bhagavad Gita and Kantian Ethics on the Problem of Right Action for the Wrong Reason

This paper examines a persistent problem in moral philosophy: whether an action retains its moral worth when it is right in outcome but motivated by self-interest rather than duty. Using the Mahabharata's portrayal of Karna as an interpretive anchor, the paper puts Immanuel Kant's distinction between acting from duty and acting merely in conformity with duty into sustained dialogue with the Bhagavad Gita's doctrine of nishkama karma, or action performed without attachment to its fruits. Drawing on empirical work in moral psychology on moral identity, moral reputation, and trust, the paper argues that these two traditions, despite arising from unrelated cultural and historical contexts, converge on a shared claim: the moral value of an action is inseparable from the quality of intention behind it, and this quality has measurable psychological and social consequences. The paper's original contribution is the Duty–Detachment Moral Integrity Model (DDMI), a formal framework that operationalizes intention purity, outcome attachment, moral identity strength, stress, and perceived social trust into a composite index of moral integrity, together with a set of equations describing how these variables interact and propagate through a social group. The model is offered as a bridge between normative philosophical claims and testable psychological hypotheses, and the paper outlines an empirical design by which it could be evaluated. The paper concludes that doing the right thing for the wrong reason is not a morally neutral shortcut but a pattern that erodes individual moral identity and collective trust over time, and that both Kant and the Gita, read together, offer a coherent account of why this is so.