What 580 Years Actually Shows
Ten findings from the historical record and ten predictions for AI, grounded in 52 primary sources and 20 case studies.
1. Ten Findings from 580 Years What the historical record actually shows
These findings emerge from the full dataset: 10 general-purpose technologies and 11 occupation-level disruptions. Each one is grounded in specific case evidence.
2. Ten Predictions for AI Displacement What the historical record suggests will happen next
These aren't forecasts. They're the base rates from 580 years of data. The burden of proof is on anyone claiming AI will be different.
3. Spreadsheets Counterfactual The one case where massive task exposure produced more of the occupation, not less
In a sample of 20 disruptions, accountants are the single counterexample to the displacement pattern: US accountants grew from ~1M (1985) to ~1.4M (2020) after Excel substituted the core calculation task. Three structural conditions had to hold at once: elastic output demand, an intact skill ladder, and complement-not-substitute for the core task. The same scorecard can be applied per occupation to AI exposure.
4. Two Eras of Institutional Response Why institutional response lag cannot be measured for pre-1930 cases
The 20 cases partition into a pre-welfare-state era (1440–1880), where institutional response apparatus did not yet exist, and a post-welfare-state era (1930–present), where institutional response lag (the years between first displacement and the first major policy response) can be measured. The current freelance/platform/cross-border-remote coverage gap is the second structural gap of this kind. Historical precedent suggests it closes through institutional invention, not extension.
5. Methodological Appendix Cross-case metric feasibility matrix
Per-case data confidence per metric: where numbers are observed (H), derived via triangulation (M), heavily estimated (L), or unavailable (U). Full narrative + scope decision on analysis.html. Read full analysis →