Recent proposals for a “two-tiered” or “dual-track” trade system—combining a
conventional MFN regime with a second tier of deeper, preferential disciplines for
coalitions of “willing” members—are marketed as pragmatic responses to WTO gridlock
and geoeconomic rivalry. This paper asks whether the architecture, normative implications,
and distributional effects of such proposals are genuinely novel or merely a re-branding of
long-standing instruments (GATT Article XXIV, the Enabling Clause, critical-mass
agreements, and open plurilaterals). Using an original dataset of 197 preferential initiatives
(1957–2023) and process-tracing of four contemporary negotiations (CPTPP, IPEF, EU
Carbon Border Adjustment, and the proposed G7 “Climate Club”), we find that the current

wave of two-tiered designs differs from historical precedents in three respects: (1) issue-
specific rather than tariff-based differentiation, (2) explicit linkage between second-tier

concessions and extra-territorial regulatory standards, and (3) conditional MFN extension
that can be revoked for non-participants. Yet these innovations largely replicate earlier
patterns of exclusion and power asymmetry. Quantitative simulations show that welfare
gains accrue disproportionately to rule-makers, while outsiders face terms-of-trade losses
that exceed those observed under classic FTAs. The paper concludes that the two-tiered
turn is evolutionary, not revolutionary: its institutional novelty is thin, but its political
salience is high precisely because it reframes old forms of discrimination as cooperative
minilateralism.