Frankfurt's 1971 architecture of the will — first-order desires aim at objects in the world, second-order desires aim at one's own wanting — the distinction that separates persons from creatures who merely want.
The most important distinction in the philosophy of action is not between good desires and bad ones but between a creature that merely wants things and one that evaluates its own wanting. Frankfurt drew this line in his 1971 essay 'Freedom of the Will and the Concept of a Person,' establishing that a first-order desire pushes toward action — hunger, the impulse to check a phone, the pull to open Claude Code at midnight — while a second-order desire asks whether the first-order desire is one the person endorses. A dog has first-order desires. A person has both. Freedom, on this architecture, lives in the relationship between the two levels: the person is free when the desire that moves her to action is the desire she wants to be effective.
First-Order and Second-Order Desires
In The You On AI Field Guide
The framework is structural rather than normative. Frankfurt did not specify which desires a person should endorse; he specified the conditions