CONCEPT
The Separateness of Persons
Rawls's foundational objection to utilitarianism—the principle that gains to one person cannot compensate losses to another, because each person lives one life and bears one set of costs, and no aggregate calculation can dissolve the individual behind the average.
The most consequential disagreement in moral philosophy is not between liberty and equality, or between tradition and progress. It is between two ways of counting. Utilitarianism counts by summing: if the total benefits of an arrangement exceed the total costs, the arrangement is justified, regardless of how the benefits and costs fall across individuals.
Rawls rejected this arithmetic on a single, foundational ground: persons are separate. The engineer whose professional identity is dissolved in the AI transition is not compensated by the fact that a thousand other engineers have been empowered. The child who lies awake wondering what she is for is not compensated by the fact that her generation will have access to tools of unprecedented power. The burnout that accumulates invisibly in the worker whose cognitive rest periods have been colonized by AI-assisted tasks is not offset by the productivity gains captured by the shareholders of the company that deployed the tools. Each