The story
From Homer's Odyssey, Book XII (composed around 750 BCE):
"Stop your ears with wax so you may hear nothing of their song. But if you yourself are anxious to hear them, then have your men tie you tightly in the swift ship, hand and foot, upright in the mast-step, and the ropes' ends made fast to the mast, so that you can take pleasure in hearing the song of the Sirens. And if you should beseech your men, and command them to release you, then they must tie you up with even more rope."
Ulysses wants two things at once: to hear the sirens (a unique experience no living man has heard) and to survive (the sirens kill those who follow them). The two desires conflict at the moment of choice. He resolves the conflict by binding future-Ulysses with rope and his crew's commitment, settling the decision while present-Ulysses is calm and rational on shore.
When the sirens sing and Ulysses begs to be released, the crew refuses (he had pre-committed them to refuse). The system works. The choice was made when the right Ulysses was choosing.
From literature to economics
The economic formalisation arrived 2,700 years later. Thomas Schelling, in The Strategy of Conflict (1960) and his essays on self-command (1980, 1984), used "Ulysses pact" as the technical term and developed the underlying concept: rational agents will sometimes deliberately limit their own future options.
Schelling's contribution was to formalise the "multiple selves" framing. Calm-Schelling and impulsive-Schelling are effectively different agents with conflicting goals. Pre-commitment is how calm-Schelling constrains impulsive-Schelling's choice set. The framing replaced earlier conceptions where the conflict was treated as failure of willpower (a moral framing) with a structural framing (an architectural problem to be solved).
Kahneman, Tversky, and Thaler built on this framework throughout the 1980s-2000s, eventually winning Nobel prizes for prospect theory and nudge theory respectively. Pre-commitment / Ulysses pact remains one of the foundational concepts.
Modern Ulysses pacts
The mechanism is everywhere once you know to look:
- Automatic 401(k) / IRA contributions. Money leaves the paycheck before reaching checking. Pre-committed savings.
- Cooling-off periods. Mandatory waiting periods for divorce, large purchases, gun sales. Society-level Ulysses pacts.
- Advance directives. Healthcare wishes recorded while of sound mind, binding future-self even in altered states.
- Locked retirement accounts. Penalties for early withdrawal raise the cost of breaking the commitment.
- Pre-paid memberships. Gym, yoga, therapy. Sunk cost makes the commitment hold.
- Money-stake commitment apps. StickK, Forfeit, Beeminder, ScreenFine. Modern productised Ulysses pacts.
- Hardware separation. Light Phone, Brick, locked drawers for car keys. Physical Ulysses pacts.
- App deletion + Content Restrictions blocking reinstall. Software Ulysses pact applied to phone use.
Designing your own
The structural test for whether a commitment is a real Ulysses pact:
- Is the consequence real? Real money, real social cost, real removed option. Streaks and self-shaming do not count.
- Did calm-you decide it? Or did impulsive-you talk you into something while urgent? The pact only works when the right self made the decision.
- Is breaking it harder than honouring it? If you can opt out cheaply when the urge hits, the structure has collapsed to willpower. Schelling's test: is there a binding mechanism, not just an intention?
Most failed New Year's resolutions fail criterion 3. Most successful behaviour change wins the criterion 3 test. See the commitment devices pillar for the design specifics applied to phone use.