Segal captures the principle when he writes that 'the whip and the hand that held it belonged to the same person.' The builder is not being exploited by a system. She is exploiting herself. The whip is real — the drive to produce, the intoxication of capability — and the hand that holds it is her own. There is no external oppressor. There is only a consciousness that has chosen to crack the whip against itself and constructed elaborate architectures of necessity to conceal the choosing.
The principle cuts against both technological determinism (which absolves individuals by attributing outcomes to the technology) and market fundamentalism (which absolves individuals by attributing outcomes to aggregated preferences). Both frameworks transfer responsibility from specific choosers to impersonal forces. Sartre's framework refuses both transfers. The builder who ships carelessly cannot blame the deadline. The leader who automates the workforce cannot blame the board. The developer who adopts AI without examination cannot blame the competitive pressure. Each invokes a real condition; none of the conditions make the choice.
The principle is demanding but not impossible. Absolute responsibility does not mean the chooser must have perfect information or perfect control; it means that whatever choice she makes, within whatever constraints, the choice is hers and the consequences follow from it. The constraints shape facticity; facticity does not eliminate freedom. The practice of authenticity is the ongoing acknowledgment of this truth — keeping the lever of freedom visible, refusing the alibis that would conceal it.
Developed throughout Being and Nothingness (1943) and given its most quoted formulation in Existentialism Is a Humanism (1946): 'Man is responsible for everything he does.' The principle is sharpened in Anti-Semite and Jew (1946) and in the political ethics of Notebooks for an Ethics (posthumous).
No transfer to circumstance. External conditions shape what choices are available but do not make choices; responsibility remains with the chooser.
Every alibi is a fabrication. The appeal to necessity that conceals a choice is, in Sartre's analysis, a specific form of bad faith.
The whip is held by the chooser. Auto-exploitation in the AI age has no external oppressor to blame; the whip and the hand that holds it belong to the same person.
Responsibility retained is freedom retained. The person who owns her choices can choose differently; the person who has concealed her choices under alibis has buried the lever.
Critics including Maté and others working in trauma theory have argued that Sartre's account underestimates the ways early experience can compromise the capacity for free choice. Sartre's framework can accommodate such claims only by distinguishing between the ontological structure of freedom (which is never eliminated) and the practical exercise of freedom (which can be severely constrained by psychological facticity).