A Debt to the Future Self

"Most of life passes by those who do it badly; a great part by those who do nothing; all of life by those who do the wrong thing." — Seneca, De brevitate vitae, 1.

In De brevitate vitae Seneca wrote: life is not short — we make it short, spending it on other people's urgencies. The future "self" has no voice in today's meeting; today's "I" decides for him, and almost always in his own favour. This is not a moral defect; it is the architecture of the mind: the near looks larger than the far, and without specific discipline today always beats ten-years-from-now.

Economists call this "temporal discounting." We automatically shrink any future good when we evaluate it: a dollar tomorrow is worth a little less than a dollar today; a year from now, noticeably less; twenty years out, very little. Hyperbolic discounting shows the function is even steeper than exponential would predict: we overweight the present out of proportion. Ancient ethics called this imprudence and treated it as a fundamental defect of practical reason.

Debt as the mirror concept

Debt is a promise from today's self to the future. When I take a loan, I promise that my future self will repay. That future self had no voice in the negotiation; the decision was taken by me-today, largely on the basis that me-today needs money.

Seneca would have said: this is a fair deal if it is honest — that is, if today's self actually thought about the future and weighed its interests. It becomes an unjust deal when today's self never even asked what the future would choose if asked. Then debt becomes theft from oneself.

Pensions and the debt to your self twenty years on

Modern pension systems are an institutional attempt to treat temporal discounting. Default contributions, automatic rate escalation, tax incentives — all so that today's self cannot systematically rob the future. Behavioural economics (Thaler, Save More Tomorrow) showed: if you simply ask people about pensions, most save little. If you default them into the programme, they save three times as much. Context wins where reason loses.

This is Stoic practice translated into policy: we build external scaffolding because internal discipline is insufficient. Seneca would have approved. He himself advised Lucilius to write down obligations, so the future lazy self could not retreat.

Climate and the debt to another generation

The climate debate is the same temporal discounting, only thrown across generations. The costs of emissions reduction fall today; the benefits fifty to a hundred years from now. Apply a market discount rate (4–5% per year) and future benefits shrink almost to zero. Mathematically correct and ethically absurd: we are effectively deciding that our grandchildren are worth less because they are further in time.

Stern in his 2006 report proposed a radically low rate (0.1%) precisely for this reason: the moral position must precede the maths, not be derived from it. An ancient argument in a modern suit: phronesis sets the boundary inside which techne does the computation.

Today's "I" has no right to decide alone for the future, even when the future does not yet exist. Especially when the future does not yet exist.

The ancient technique: "council with the future self"

The Stoics advised the practice: imagine yourself ten years out — not "the future" in general, but a specific person ten years older — and ask what he would want you to do today. It is not a magical journey, it is an exercise of imagination. It works because it converts the abstract "future" into a concrete subject whose interests can be considered. Today's self cannot bargain with an abstraction; with a concrete person, it can.

Debt and identity

Psychologists have shown: people who tend to perceive their future self as the same person save substantially more and take more responsible decisions. For those to whom "me in twenty years" is almost a stranger, the loan is taken by one person and repaid by another. Hal Hershfield's experiments with aged photos showed that the mere sight of one's own aged face changes behaviour: pension contributions rise on average by a third.

The Stoics reached the same point by a different road. Seneca writes that the wise man already lives all ages at once: youth with its energy, old age with its experience. He does not wait to become old; he includes the old man in his present self, and so takes decisions from an extended person rather than from a fragment of today.

What to do

Schedule three "councils with the future self" each year: 31 December, your birthday, the anniversary of an important event. Sit for an hour, picture yourself ten years out, write what he would want you to do in the coming twelve months. Save it. Reread it in three months. It is not a plan — it is a voice that otherwise has no microphone. Today's self almost always overweights today's wants. The future self will not break that balance — if you give him the floor.