The principle is Keynesian in origin but reaches back through utilitarian ethics and forward to contemporary policy debates. It rejects the view — common in classical economics and in some strands of libertarian thought — that present suffering is justified by future gains, so long as the future gains are sufficiently large.
The AI application is urgent. The optimist's argument that every previous technological transition produced net long-run expansion is empirically correct. The Luddite exhibit demonstrates what this argument licenses: the dismissal of concentrated short-run suffering as the necessary cost of diffuse long-run benefit that the sufferers will not live to experience.
Short-run moral priority does not reject long-run analysis. It insists that long-run claims are not a substitute for short-run institutional response. The generation navigating the AI transition requires retraining, income support, identity reconstruction infrastructure, and labor protections — not as consolation prizes for eventual long-run benefit but as the institutional bridges that make the transition survivable.
The principle has a specific macroeconomic implication. Policies that concentrate transition costs on the workers most directly affected (laissez-faire displacement) produce contractionary aggregate effects that damage the economy as a whole, including the firms and investors whose short-term incentives might otherwise have favored the extractive response. The moral priority and the macroeconomic calculation converge.
The principle is implicit throughout Keynes's work and explicit in the 1923 Tract on Monetary Reform's 'in the long run we are all dead' passage.
Time-bounded moral relevance. Benefits that accrue only to future generations do not substitute for obligations to the present.
Structural, not sentimental. The principle is an analytical commitment, not an appeal to compassion.
Long-run arguments as evasion. The classical appeal to eventual adjustment functions as a mechanism for dismissing present suffering.
Macroeconomic convergence. The moral priority aligns with the aggregate-demand analysis that concentrated transition costs damage the whole economy.
Institutional implication. Short-run priority requires institutional construction, not merely institutional critique.