Jacobs sets four G20 priorities against an institution that rarely delivers them

Summary

Michael Jacobs has proposed in The Guardian four G20 priorities for the United Kingdom’s 2027 presidency, but the institution’s documented pattern of lowest-common-denominator communiqués establishes a base rate against which the proposal’s deliverability must be measured.
The 2009 London summit — the last UK-chaired G20 — produced a $5tn fiscal stimulus, expanded IMF lending, and the Financial Stability Board, an outcome Jacobs describes as anomalous for the institution and one that coincided with acute shared crisis perception among major members.
The four priorities — a binding AI treaty, food security coordination, climate resilience, and debt restructuring for low- and middle-income economies — exhibit the interconnection and absence of stopping rules that planning theorists Horst Rittel and Melvin Webber have characterised as features of “wicked problems,” a structure that compounds the difficulty of joint G20 action on any one of them.
Substantive 2027 outcomes depend on three unresolved conditions the column does not price: the December 2026 Miami summit’s actual result, the UK government’s allocation of negotiating capital between G20 and domestic priorities, and the evolution of the four problems themselves by December 2027.

Michael Jacobs, a University of Sheffield professor of political economy and former energy and climate change adviser to former prime minister Gordon Brown, has set out in The Guardian’s opinion section four priorities the British government should pursue when it assumes the G20 presidency in 2027: a binding global treaty on artificial intelligence regulation, coordinated action on food security, climate resilience measures for vulnerable countries, and a debt restructuring programme for low- and middle-income economies. The proposal sits inside an institution Jacobs describes as “an oddly weak institution” — 19 member countries plus the European Union and the African Union, with no permanent headquarters, no staff, and no standing website, and public records of its agreements maintained as unofficial pages by University of Toronto academics. The column, published 5 October 2026, also proposes a presidential slogan — “national security through international cooperation” — to match the priorities. Whether the 2027 summit produces binding action on any of the four issues depends less on the merits Jacobs identifies than on three conditions the column does not resolve.

The proposal and its setting

The four priorities Jacobs has identified are an AI treaty, food security, climate resilience, and debt restructuring. The first is a binding global agreement on artificial intelligence regulation: Jacobs writes that “recent alarm over the existential risks of AI” creates an opening for the UK to lead the world toward a binding agreement on AI control, and that even if President Donald Trump is unwilling to sign, securing the participation of the rest of the world would be “a vital achievement” and “a future US president might well wish to accede later.”

The second is coordinated action on food security. Jacobs warns of “a perfect storm for the world’s food system” as an incoming “supersized” El Niño pattern combines with the climate crisis, soil and biodiversity loss, and the war in the Middle East’s effect on diesel and fertilizer costs. Agricultural yields are falling, food prices are rising, and millions face hunger, he writes.

The third is climate resilience. Jacobs notes that the Trump administration does not support emissions reduction but does accept the need to adapt to climate change, and that this year’s extreme weather events have “impressed on all governments how urgent this is.” The G20 should agree to provide more support to the most vulnerable countries, he argues.

The fourth is debt restructuring. Jacobs writes that low- and middle-income economies’ debt has become unsustainable “through no fault of their own, but because of rising global interest rates” — a reference the column anchors in the Federal Reserve’s effective federal funds rate of 3.75 percent in the most recent monthly average, according to Federal Reserve Economic Data — and that the compounding of debt burdens with rising energy and food prices has made sustainable economic growth “all but impossible” for many of these countries.

Jacobs has also proposed a presidential slogan, “national security through international cooperation,” to match the four priorities. The article frames the G20 presidency as a “major foreign-policy responsibility” for the incoming British government. The incoming prime minister — Andy Burnham, named in the column’s headline — has, according to Jacobs, “indicated he wants to concentrate on domestic policy.” The United Kingdom last chaired the G20 in 2009 under Brown; the 2027 presidency is positioned as a renewed major foreign-policy responsibility, with a G20 the column argues is structurally weaker than it was then.

What G20 history establishes as the base rate

The 2009 London summit, the last time the United Kingdom chaired the body, produced, by Jacobs’s account, three concrete outcomes: a $5tn fiscal-stimulus commitment among G20 member states, an expansion of IMF lending to developing countries, and the creation of the Financial Stability Board to coordinate global financial regulation. At an April 2009 press appearance, then-US president Barack Obama told French president Nicolas Sarkozy — who had said “none of us has a plan” — that “Gordon has a plan,” Jacobs recounts.

Beyond 2009, G20 leaders’ meetings have typically produced lengthy communiqués reflecting “lowest-common-denominator agreement on broad principles,” Jacobs writes, and the body “rarely commits its members to doing anything they were not planning to do anyway.” The 2020 agreement to suspend developing-country debt during the Covid pandemic, followed by a “common framework” for debt treatment, was one of the few subsequent exceptions.

The 2026 US-hosted summit, scheduled for a Trump property near Miami, is, in Jacobs’s reading, expected to produce “a show of personal and US power and very little attempt to achieve anything by way of multilateral cooperation.” South African president Cyril Ramaphosa, who hosted the previous summit, “was glad simply to get any kind of agreed communique,” Jacobs writes. Trump boycotted last year’s G20 summit.

The base rate the column itself supplies, therefore, is the lowest-common-denominator summit, not the 2009 outlier. Where G20 outcomes have been substantive — 2009 and 2020 — they coincided with acute, shared crisis perception among major members.

Three framings of what the G20 is

Three framings of what the G20 is are visible in the proposal and the record. Jacobs’s own framing treats the G20 as the “effective executive committee of the global economy” whose weakness is a pathology a sufficiently determined chair might remedy. A second framing treats the G20 as a focal point where leading economies signal alignment or divergence, but where agreements track what major members were already prepared to do rather than what a presidency wished they would do. A third framing, more genealogical, treats the G20 as a creature of the late-2000s global financial crisis, whose original coordinating function has eroded as the immediate crisis memory faded.

Each framing implies a different prior probability for what a 2027 British presidency can deliver. On Jacobs’s own characterisation, the evidence he supplies points most heavily toward the second framing — G20 as focal point.

The four priorities as interconnected problems

The proposal’s analytical weight sits on the interconnection among the four issues, and the difficulty follows from that interconnection. Each priority exhibits features the planning-theory tradition, originating with Horst Rittel and Melvin Webber’s 1973 paper on policy sciences, has identified as defining “wicked problems” — including no definitive formulation, no stopping rule, and interconnection with other problems that resists decomposition.

Food security sits at the intersection of an incoming El Niño pattern, the climate crisis, soil and biodiversity loss, and the war in the Middle East’s effect on diesel and fertilizer costs. Climate resilience measures must contend with the Trump administration’s documented acceptance of adaptation but not emissions reduction. Debt restructuring is driven by rising global interest rates — the column’s anchor figure is the Federal Reserve’s effective federal funds rate of 3.75 percent — compounding with rising energy and food prices. A binding AI treaty requires participation from the United States and China, the two jurisdictions whose current diplomatic posture on technology governance is not aligned.

Each priority’s probability of being addressed in isolation is low; each priority’s probability of being addressed in conjunction with the others is lower still, because the G20’s documented mode of operation is communiqués of broad principle rather than joint action on interconnected issues.

A diagnostic-value assessment of which priorities most clearly distinguish a substantive-outcome world from a lowest-common-denominator world produces an ordering. Climate resilience — a coordinated pledge to vulnerable countries — looks roughly equally likely in either world, and has limited diagnostic value. An AI treaty depends on a binding commitment from governments that have not previously shown willingness to constrain their own frontier AI development; in a world where such a treaty is achievable, almost any other 2027 deliverable would also be achievable, and vice versa. Its presence is therefore a stronger signal of an unusually cooperative environment than of a normal one. Food security — the “perfect storm” configuration — would, on Jacobs’s account, force coordination even on governments inclined to resist it. Debt restructuring addresses a problem that has already produced one G20 framework in 2020, and which therefore has the strongest existing institutional precedent among the four.

Four trajectories for the 2027 summit

Four trajectories bracket the 2027 outcome.

The trend-extrapolation scenario, which inherits the highest prior probability from the documented record, sees the summit producing a communiqué substantially similar to those of recent years, with limited new commitments and rhetorical continuity on the priorities the chair names. The 2026 Miami summit’s expected outcome is its nearest analogue.

The orthogonal-driver scenario sees a sufficiently acute shock — a sovereign default cascade, a major climate event, an AI-related incident — pushing one or more of the four priorities from rhetorical to operational status, on the 2009 model. The 2009 stimulus and the 2020 debt-suspension precedent suggest that crisis-driven coordination remains possible when conditions reach an acute threshold. Whether the four problems Jacobs identifies rise to that level of acuteness by December 2027 is a key uncertainty the substrate does not resolve.

The discontinuity scenario sees an escalation of US-China or US-EU friction, or the G20’s effective dissolution as a summit-level forum, leaving the British presidency without its principal counterparty; the agenda is either inherited by a smaller grouping or absorbed into existing institutions.

The reversal scenario sees a coalition of the willing — the UK, the EU, China, and other G20 members excluding the US — agree to a binding AI framework, with the expectation, in Jacobs’s phrasing, that “a future US president might well wish to accede later.” This scenario is structurally different from the other three because it abandons the G20-wide format for a sub-G20 arrangement, and it depends on a US posture the column does not establish.

Three conditions that will determine the outcome

The posterior probability of substantive 2027 outcomes depends on three variables the column does not resolve.

The 2026 Miami summit’s actual outcome will shift the prior. A communique on any of the four priorities shifts the prior upward; a no-communiqué outcome shifts it downward and gives the UK chair diplomatic space to differentiate the 2027 agenda. Under the non-cooperation posture Jacobs attributes to the Trump administration, a Miami communique engaging any of the four priorities would represent a posture change against the non-cooperation baseline Jacobs already forecasts; the no-communiqué outcome is the baseline against which any such shift would be measured.

The UK government’s allocation of negotiating capital is the second variable. A G20 presidency is a sustained foreign-policy commitment that competes with domestic priorities. The probability the UK invests serious capital in any of the four priorities depends on this trade-off, which the column does not quantify. The political-economy constraint Jacobs himself flags — competing demands of a British prime minister whose stated focus is domestic — constrains the political capital a chair can plausibly commit to a low-payoff summit.

The evolution of the four problems themselves between now and December 2027 is the third variable. An El Niño-driven food crisis, a sovereign default by a G20-relevant economy, or a high-profile AI incident would each shift the prior on member willingness to act. The substrate does not forecast these conditions.

What the analysis converges on

The G20’s documented inability to commit members to action beyond their pre-existing intentions interacts with the interconnected nature of the four problems and the conditional dependencies on the 2026 Miami summit, on UK political will, and on the evolution of each problem. The combination yields a probability band whose width is set by genuine uncertainty, not by analytical imprecision.

The column documents that the G20 has, in rare cases, achieved something close to the synthesis Jacobs’s slogan names — “national security through international cooperation”: the 2009 stimulus, the 2020 debt suspension. Whether 2027 produces another such case depends on conditional dependencies the column identifies but cannot price. Jacobs’s case for the agenda and his own base rate against which its prospects should be calibrated are both contained in the same column.

What the column does not establish

Four gaps are visible in the substrate. The column does not forecast whether the December 2026 Miami communique will engage any of the four priorities, and therefore whether the prior shifts before 2027 begins. It does not specify the UK government’s actual allocation of negotiating capital across the G20 versus domestic priorities. It does not forecast the El Niño, sovereign-default, and AI-incident conditions between publication and the 2027 summit. And it does not establish the accession posture of a future US administration toward an AI treaty concluded without the present one. The 1973 Rittel-Webber paper is referenced as the originating source of the “wicked problems” framing; the column does not directly quote the paper.

Analytical techniques used in this piece

This analysis applies the methods below. Each links to a short, plain-English explainer you can read and reuse.

Bayesian Hypothesis Network: Updates the probabilities of competing hypotheses as evidence accumulates.
Wicked Futures: Explores a long-horizon, deeply entangled future with no clean resolution.
Wicked Problems: Treats a problem as wicked — no stopping rule, no clean test of success, every attempt consequential.
Bayesian Reasoning: Starting from base rates and updating beliefs proportionally as evidence arrives.