A book in progress · draft in public · 2026

Society
in silico

Simulating futures to build the one we want. The story of teaching computers the law, building a simulated country to run it on, and grading the predictions against reality — and of the fork that decides who the machinery serves.

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In 1957, Guy Orcutt proposed simulating society household by household, decades before machines could run the idea. This book is about what happened when it finally got its machinery — encoded law, a simulated country, forecasts graded by reality — and the case it builds is one sentence long: history should have auditors, not an author.

The discipline the book runs on

A simulation is admissible only where its verification chain terminates in ground truth — a rule checked against the statute, a population checked against the census, a forecast graded when the official number lands.

Chapter 3 states it; chapters 9–13 build the machinery that enforces it — merge-blocking source checks, oracle races against the models governments already trust, and a public scoreboard that waits for reality.

Contents

17 chapters · 60,055 words
Preface 6 min Introduction: The model and the world 11 min

Part I · The closed stack

01 The birth of microsimulation 14 min 02 The tax model wars 20 min 03 The accuracy question 16 min 04 A wall of frustration 15 min

Part II · The open engine

05 Proof of concept 17 min 06 The household and the society 24 min 07 The three ingredients 19 min

Part III · The agent turn

08 The AI can't do your taxes 15 min 09 Encoding the law 19 min 10 The verification problem 16 min 11 Microsimulation anywhere 16 min 12 The decomposition 17 min

Part IV · The prediction pole

13 The uncertainty gap, and the scoreboard 19 min 14 Simulating opinion 16 min

Part V · The horizon

15 Simulating democracy 14 min 16 Simulating values 19 min 17 Society in silico 18 min

A draft, graded like its subject

The book argues that claims should carry their verification state, so this draft carries its own. These figures are computed from the manuscript at every build; the pending marks are visible in the text where they sit.

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chapters
17 across 5 parts
words
60,055
citations pending
23
facts to re-verify
24
forecasts resolved
0 — graded when reality arrives