Philosophy
Contractualism and the Scanlonian Notion of Justifiability
Quick fact
T.M. Scanlon's contractualism holds that an action is wrong if it violates a rule that no one could reasonably reject, shifting the focus from outcomes to the idea of justifiability to each person.
Why this is interesting
You probably think it's wrong to lie or break a promise, but have you ever asked what makes such acts wrong? Contractualism says it's about whether you could justify yourself to others — but how does that work?
Read the full explanation
Understanding Contractualism and the Scanlonian Notion of Justifiability
Imagine you are about to do something that affects others — say, telling a lie to avoid embarrassment. Contractualism asks: could I justify this action to the person I'm lying to, if they were fully informed and rational? The moral question isn't 'what maximizes happiness?' or 'what does duty say?' but 'can I defend my action to others on grounds they couldn't reasonably reject?' This turns morality into a shared enterprise: we seek principles for how to live that everyone, aiming to find common ground, could accept. Scanlon calls these 'principles for the general regulation of behavior.' A rule is acceptable if no one can reasonably object to it. So, lying is wrong because a principle permitting lying would be reasonably rejected — it would give everyone the freedom to lie, which is something no one could reasonably want. The focus is on respect for each person's capacity to assess reasons and on treating others as equals in the process of justification.
A deeper explanation
Scanlon's contractualism is built on the idea that moral motivation comes from the desire to justify our actions to others on grounds they cannot reasonably reject. The key mechanism is the test of 'reasonable rejection' — a principle is valid if no one could reasonably reject it, assuming everyone is motivated to find mutual justifiability. This avoids the need for an actual contract; instead, it's a hypothetical thought experiment. The notion of 'reasonableness' is crucial: it's not about what anyone might prefer, but about what a person could reasonably reject, given a shared aim of coming to agreement. This makes the theory pluralistic, because it doesn't rank all values on one scale; it considers the various reasons people have, such as promises, consent, and well-being. Scanlon contrasts this with utilitarianism, which aggregates welfare, and with Kantianism, which emphasizes universal law — but he incorporates respect for persons through the requirement of justifiability. The theory also introduces the 'value of being recognized by others' as a basic reason to act morally: we want to live with others on terms they couldn't reasonably reject, affirming our equal standing. This approach handles edge cases: for example, if an action would save lives but violate someone's rights, we must see if a principle permitting it could be reasonably rejected — and often it can, because people would reject a rule that allows using them as means without consent. Thus, contractualism grounds a rights-based, pluralistic ethics that gives central place to interpersonal justification.