Worlds to explore
These small public worlds let you reconstruct a moment, change an action, and see what the model forecasts next.
Play with a world
Political history
Bismarck
Explore diplomacy, alliances, and alternate choices in Bismarck's political world.
A hidden-history forecasting test.
Macroeconomy
Macro History
Explore macro indicators, policy records, and dated economic state in a fixed public snapshot.
5,339 records through June 9, 2026. A dated laboratory, not a current feed.