E5 · stress-preview.e5-gbr-s01-hold

United Kingdom, hold, 10 years

100 simulations of 10 rounds from the 2026 position. United Kingdom decides by the hold method; trade bloc rupture in year 3 at 1.2 times its load over the random background.

Model 0.2.0 · graph 0.2.0 · parameters 0.1.1 · seeds 1–100 · elasticity sampled within each bracket

Every simulation · Compare with another experiment · More experiments like this

Not a forecast

Simulations of a structural model with seed parameter values, to compare methods and test the model. Other nations stay at their 2026 ratings throughout.

Outcome across simulations

The median at 2036, with the 10th to the 90th percentile of the 100 simulations under it.

Capability index: 15.91 (−0.54); From 16.45; 15.33 to 16.20
Rank by index: 6; From 3; 5 to 8
Domains at Tier 1: 0; From 2; 0 to 2
Tier rank: 18; From 5; 5 to 18

Capability index by round

Rank by index, by round

Every objective at the position and at the horizon
Objective	2026	10th percentile	Median	90th percentile	Better
Capability indexprimary	16.45	15.33	15.91	16.20	higher
Rank by index	3	5	6	8	lower
Tier rank	5	5	18	18	lower
Domains at Tier 1	2	0	0	2	higher
Score sum	1196.4	1117.0	1158.8	1179.0	higher
Goal-weighted score	1196.4	1117.0	1158.8	1179.0	higher
Resilient score	1196.4	1151.0 (mean score sum over the simulations)			higher

The capability index is the mean of the three dimensions, each the mean of its domains, each the mean of its groups. Tiers are Pareto layers within each domain; the tier rank orders nations by domains held at Tier 1, then Tier 2, and so on. The goal-weighted score is the score sum unless the experiment sets a goal. The primary objective is the one the experiment is judged on; every other objective is reported beside it.

Credits

What each round’s credits went on in the median simulation. Across all simulations, nothing was spent on actions.

Report

Written from the simulation record by the loop's narrator. Every figure names the query it came from, in square brackets.

Batch stress-preview. Model 0.2.0, graph 0.2.0, parameters 0.1.1. 100 simulations, seeds 1 to 100; probes on 25. Every figure is a distribution over simulations of a structural model with seed parameter values; it shows what the model implies under these settings, not what will happen. Other nations are frozen at their 2026 ratings. No reconstructed historical data is used in this experiment.

Headline

United Kingdom played 10 rounds from 2026 under the hold method, with stress events, 100 times. Its capability index moved from 16.45 to a median of 15.91 (−0.54), with 90 per cent of simulations between 15.05 and 16.31 [experiment_objectives].

Starting position

In 2026 the nation ranks 3 on the index against the frozen field, holds 2 of nine domains at Tier 1 and has a tier rank of 5. Its base income is 1,094 credits a year, calibrated so that its 2026 position is affordable with headroom for investment.

What was decided

No actions were taken: the method holds, so income pays maintenance and the rest is carried over.

What the world did

A median simulation saw 2 shocks and 1 upside events. The most damaging per firing were S01 (100 firings in 100 simulations, −33.9 points each); S08 (14 firings in 14 simulations, −26.5 points each); S03 (17 firings in 16 simulations, −26.2 points each) [experiment_shocks]. Upside events fired 75 times across all simulations [experiment_shocks].

The groups that lost most to shocks, per simulation: Economic Leverage & Dependence −1.66; Export Capability & Sophistication −1.58; Global Value Chain Position −1.57; Trade Policy & Market Access −1.54 [experiment_shock_damage_by_group].

The edges that carried most change through the graph, per simulation: Semiconductors & Advanced Computing to Artificial Intelligence (−0.15 points); Fiscal Capacity & Public Finance to Social Infrastructure (−0.13 points); Economic Output & Productivity to Fiscal Capacity & Public Finance (−0.11 points) [experiment_propagation_by_edge].

Where it ended

At 2036 the median rank is 6 (5th to 95th percentile 4 to 11), the median count of Tier 1 domains 0 (0 to 3) and the median tier rank 18; the resilient score, the mean score sum over simulations, is 1,151 [experiment_objectives].

Tier 1 probability changed most in: governance and integrity (100 to 41 per cent of simulations); production and innovation (100 to 12 per cent of simulations) [experiment_tiers_by_round].

Why

Without shocks the index ends +0.816 higher on average, so the shocks cost about 0.816 index points [experiment_probe_attribution].

Holding instead of following this method changes the index by 0.000: that is the method's worth against doing nothing [experiment_probe_attribution].

Removing the largest shock of a simulation raises the index by +0.552 on average [experiment_probe_attribution].

The replay probe reproduces the simulations exactly (index change 0.000000), so the attributions are clean [experiment_probe_attribution].

Surprises

The simulation furthest from the median (seed 42) ends −1.09 from it, with 4 shocks and 1 upside events [experiment_outlier_simulations].

Comparison

Against the hold experiment for the same nation (e5-gbr-s02-hold), the median index is −0.06 points apart, the median rank 6 against 6, and Tier 1 domains 0 against 1 [experiment_against_hold].

No backcast comparison: this experiment does not start from a historical position [experiment_against_history].

What each decision and shock was worth

Counterfactual probes on the first 25 seeds: the same simulations with one thing changed, paired seed by seed. A removed decision or shock is taken out and the other decisions replayed unchanged, so the difference is that item's worth.

Probe	Index	Score sum	Tier 1	For example
Hold instead of the method	0.000	0.0	0.00
No shocks	+0.816	+56.9	+2.12
Replay of the recorded actions (must change nothing)	0.000	0.0	0.00
Without the 1st largest shock	+0.552	+38.3	+1.32	2029 S01 (-33.8 points)
Without the 2nd largest shock	+0.354	+25.0	+0.43	2036 S03 (-27.2 points)
Without the 3rd largest shock	+0.261	+18.3	+0.14	2029 S06 (-12.3 points)

Simulations

Three simulations told round by round, each on its own page: the one nearest the median index at the horizon, and those nearest the 10th and the 90th percentile. Every one of the 100 is listed with its outcome on the simulations page.

All 100 simulations

Events

How often each shock and upside event began across the simulations. Shocks come from the ten downside scenarios and upside events from the ten upside ones, at their yearly likelihood.

Event	Kind	Simulations	Mean round	Points
Trade bloc rupture S01	Shock	100 per cent	3.0	−33.9
Breadbasket failure S06	Shock	20 per cent	5.0	−10.8
Hybrid coercion S04	Shock	18 per cent	5.2	−14.2
Water-efficient food leap S16	Upside	18 per cent	5.1	+3.3
Regional war spillover S03	Shock	16 per cent	5.7	−26.2
Global funding seizure S02	Shock	15 per cent	6.4	−23.7
Clean power threshold S15	Upside	14 per cent	5.7	+16.9
AI labour shock S08	Shock	14 per cent	6.1	−26.5
Market access opening S12	Upside	12 per cent	4.8	+16.0
Chronic disease advance S19	Upside	9 per cent	5.8	+25.1
Automated discovery step S17	Upside	6 per cent	5.9	+31.0
Legitimacy rupture S05	Shock	5 per cent	4.0	−12.7
Debt service reset S11	Upside	4 per cent	6.5	+2.6
Great-power détente S13	Upside	4 per cent	6.8	+22.6
Outbreak defence succeeds S20	Upside	4 per cent	5.2	+34.0
Core disaster S07	Shock	2 per cent	4.5	−7.2
Middle East settlement S14	Upside	1 per cent	4.0	+18.4
Public service leap S18	Upside	1 per cent	3.0	+10.2

Groups across simulations

Every capability group: its position, and its median and spread at the horizon across the simulations, with what the method spent on it.

Find a group

Domain

73 of 73 groups

Capability group	Domain	2026	2036	Change
Advanced Education	Human Capital	17.00	16.82 16.48 to 17.13	−0.18
Technical & Vocational Skills	Human Capital	15.00	14.81 14.52 to 15.29	−0.19
Lifelong Learning & Reskilling	Human Capital	14.67	14.48 14.12 to 14.79	−0.19
Early Childhood Development	Human Capital	16.00	15.80 15.44 to 16.12	−0.20
Foundational Education	Human Capital	15.75	15.55 15.22 to 15.87	−0.20
Digital & AI Competence	Human Capital	16.50	16.30 15.92 to 16.62	−0.20
Research Talent & Knowledge Creation	Human Capital	18.33	18.13 17.81 to 18.48	−0.20
Population Health	Human Capital	16.00	15.80 15.44 to 16.12	−0.20
Health System Capability	Human Capital	16.33	16.11 15.71 to 16.70	−0.22
Communications & Digital Infrastructure	Strategic Infrastructure	17.00	16.73 16.10 to 17.04	−0.27
Justice System & Fundamental Rights	Governance & Integrity	16.25	15.98 15.65 to 16.29	−0.27
Transparency, Oversight & Accountability	Governance & Integrity	16.33	16.06 15.73 to 16.37	−0.27
Political Institutions & Civic Participation	Governance & Integrity	16.67	16.39 15.91 to 16.70	−0.28
Government Effectiveness & Public Administration	Governance & Integrity	17.00	16.72 16.02 to 17.28	−0.28
Internal Security & Order	Governance & Integrity	16.00	15.71 15.21 to 16.02	−0.29
Public Integrity & Anti-Corruption	Governance & Integrity	15.50	15.21 14.87 to 15.52	−0.29
Nuclear Deterrence	National Security	16.67	16.38 15.88 to 16.63	−0.29
National Resilience & Crisis Management	Governance & Integrity	16.40	16.10 15.56 to 16.44	−0.30
Water, Sanitation & Waste Infrastructure	Strategic Infrastructure	15.20	14.89 14.23 to 15.16	−0.31
Maritime Power	National Security	17.00	16.69 15.78 to 16.93	−0.31
Resource Infrastructure	Strategic Infrastructure	14.25	13.94 13.06 to 14.26	−0.31
Agriculture & Food Infrastructure	Strategic Infrastructure	14.25	13.94 13.26 to 14.22	−0.31
Energy Infrastructure	Strategic Infrastructure	16.13	15.81 14.84 to 16.23	−0.32
Transport Infrastructure	Strategic Infrastructure	16.00	15.68 14.80 to 16.07	−0.32
Intelligence & Assessment	National Security	18.00	17.68 16.99 to 17.94	−0.32
Joint Command, Projection & Sustainment	National Security	17.00	16.68 15.83 to 16.92	−0.32
Air Power	National Security	17.00	16.67 16.17 to 16.93	−0.33
Cyber & Electromagnetic Operations	National Security	17.33	17.00 16.31 to 17.28	−0.33
Space, Aerospace & Defence Infrastructure	Strategic Infrastructure	16.50	16.16 15.59 to 16.47	−0.34
Strategic Strike & Missile Defence	National Security	14.67	14.32 13.45 to 14.56	−0.35
Social Infrastructure	Strategic Infrastructure	17.09	16.73 16.06 to 17.11	−0.36
Land Power	National Security	16.50	16.14 15.65 to 16.43	−0.36
Advanced Manufacturing	Strategic Infrastructure	15.60	15.23 14.64 to 15.56	−0.37
Force Generation & Mobilisation	National Security	14.00	13.62 13.13 to 13.85	−0.38
Space Operations	National Security	14.67	14.28 13.77 to 14.52	−0.39
Financial Infrastructure	Strategic Infrastructure	18.25	17.85 17.27 to 18.17	−0.40
Connectivity, Cyber & Trust Technologies	Critical Technology	16.60	16.09 15.62 to 16.41	−0.51
Regulatory Governance & Strategic Controls	Governance & Integrity	17.67	17.16 16.72 to 17.83	−0.51
Financial System Depth & Access	Financial Strength	17.40	16.87 15.92 to 17.20	−0.53
Quantum Technologies	Critical Technology	16.75	16.22 15.76 to 16.56	−0.53
Energy Technologies	Critical Technology	15.60	15.06 14.49 to 15.50	−0.54
Culture, Language & Education Diplomacy	Information & Influence	18.40	17.86 17.33 to 18.04	−0.54
Financial Regulation & Integrity	Financial Strength	17.75	17.21 16.27 to 17.47	−0.54
Space Technologies	Critical Technology	14.00	13.45 12.97 to 13.79	−0.55
Diaspora & Global Communities	Information & Influence	13.50	12.95 12.41 to 13.11	−0.55
Information Environment & Strategic Communication	Information & Influence	18.00	17.45 16.52 to 17.64	−0.55
Financial Stability & Crisis Management	Financial Strength	17.67	17.12 16.15 to 17.37	−0.55
Innovation & Commercialisation	Production & Innovation	17.50	16.95 16.34 to 17.29	−0.55
Technology Adoption & Diffusion	Production & Innovation	16.00	15.44 14.81 to 15.85	−0.56
Sensing, Timing & Navigation	Critical Technology	17.20	16.63 16.15 to 17.00	−0.57
Robotics & Autonomous Systems	Critical Technology	16.00	15.42 14.91 to 15.85	−0.58
Labour & Employment	Production & Innovation	15.00	14.42 13.28 to 14.77	−0.58
Economic Output & Productivity	Production & Innovation	16.00	15.41 14.43 to 15.76	−0.59
Business Dynamism & Entrepreneurship	Production & Innovation	17.00	16.41 15.83 to 16.77	−0.59
Development Cooperation & Global Assistance	Information & Influence	17.50	16.86 16.23 to 17.07	−0.64
Fiscal Capacity & Public Finance	Financial Strength	17.25	16.61 15.25 to 16.87	−0.64
Alliances & Security Cooperation	Information & Influence	18.00	17.35 16.65 to 17.63	−0.65
Sovereign Capital & External Financial Power	Financial Strength	16.40	15.75 15.07 to 16.03	−0.65
Digital & Services Trade	Trade & Investment	17.50	16.85 15.79 to 17.23	−0.65
Trade Facilitation & Logistics	Trade & Investment	17.00	16.34 15.13 to 16.78	−0.66
Artificial Intelligence	Critical Technology	17.33	16.66 16.04 to 17.12	−0.67
Structural Transformation & Complexity	Production & Innovation	14.67	14.00 13.39 to 14.34	−0.67
Investment Attraction & Projection	Trade & Investment	17.00	16.33 15.13 to 16.78	−0.67
Biotechnology & Health Technologies	Critical Technology	17.60	16.60 16.15 to 17.22	−1.00
Advanced Materials & Manufacturing	Critical Technology	16.57	15.54 15.08 to 15.94	−1.03
Semiconductors & Advanced Computing	Critical Technology	14.00	12.93 12.45 to 13.48	−1.07
Monetary & Currency Capability	Financial Strength	17.67	16.59 15.48 to 16.80	−1.08
Industrial & Sectoral Base	Production & Innovation	15.25	14.16 13.51 to 14.59	−1.09
Diplomatic Statecraft & Global Networks	Information & Influence	17.50	16.39 15.71 to 16.64	−1.11
Global Value Chain Position	Trade & Investment	16.00	14.67 13.87 to 15.04	−1.33
Trade Policy & Market Access	Trade & Investment	17.25	15.89 15.14 to 16.32	−1.36
Economic Leverage & Dependence	Trade & Investment	15.33	13.91 12.75 to 14.27	−1.42
Export Capability & Sophistication	Trade & Investment	15.67	14.24 13.45 to 14.66	−1.43

Checks

The automated checks run on this experiment before anything was written about it. A warning is a candidate finding for the improvement loop.

passcredits_conservedlargest gap between credits in and credits accounted for: 0.0e+00
passscores_in_boundsscores range 11.875 to 19.753
passno_nans0 missing values in the trajectory and objectives
passprobe_replay_reproducesthe recorded actions played back reproduce the simulation to within 0.0e+00 points (25 simulations)
passledger_balancesthe edge ledger sums to the propagated change to within 4.7e-07 points
passmove_without_shocklargest one-round change in a group with no shock landing: 0.13 points; 0% of simulations have one above 3
passtier_jumplargest gain in one domain within five years: 3 tiers (18 simulations above 2); tiers are reported, not an objective
passall_tier1_from_outside_top10starting rank 3; 0 simulations reach Tier 1 in all nine domains
passsaturation_high0% of simulations end with a group at 20 that did not start there (median 0 groups)
passsaturation_low0% of simulations end with a group at 0 that did not start there (median 0 groups)

Settings and versions

Experiment stress-preview.e5-gbr-s01-hold. Every simulation records the model, graph and parameter versions, the scenario, the method and its seed, so it can be reproduced exactly.

Nation: United Kingdom (GBR)
Position: The 2026 ratings of the National Capability Index
Method: Hold. No actions. Income pays maintenance; whatever is left is carried over, losing 5 per cent a round.
Scenario: Trade bloc rupture in year 3 at 1.2 times its load over the random background
Objective: Capability index, the primary objective the experiment is judged on; every other objective is reported beside it
Horizon: 10 rounds, 2026 to 2036
Simulations: 100 seeds, 1 to 100. Every method in the batch faces the same draws for the same seed.
Graph elasticities: Drawn for each simulation, uniformly within each edge’s bracket
Income: Base credits 1,094.1 a round, moving with the economic groups
Versions: Model 0.2.0, Capability Dependency Graph 0.2.0, parameters 0.1.1
Batch: Stress test preview (stress-preview)
Runtime: 3.2 seconds in all; 940 microseconds a round

Not a forecast: Every figure is a distribution over the simulations of a structural model, reported to compare methods and test the model. None is a prediction of what a nation will do or become.
Structural parameters: Costs, decay, vulnerability and credits are structural seed values with low or medium confidence, set by domain with single-group exceptions. Five groups have no defensible value in a single-nation model and are flagged in the parameter tables.
Other nations are frozen: One nation is simulated at a time. Every other nation stays at its 2026 rating, so rank and tiers are measured against a still field; where the simulated nation rises past others their own tiers are not re-sorted.
Starting depth and mode are defaults: The position is the National Capability Index ratings. How institutionalised each capability is, and how much was built, bought or partnered, have no data behind them yet and start from structural defaults.
Credits are calibrated, not measured: Each nation’s income is set so that its position is affordable with headroom that rises with its fiscal capacity. It is not yet fiscal capacity as a share of GDP.