We provide a quantitative macrohistory of the evolution and coevolution of three fundamental elements of English caselaw: property, contract, and procedure. Our dataset is derived from a
comprehensive corpus of reports on pre-1765 English court cases. Leveraging existing topic-model estimates, we construct annual time series of attention to each of the three legal
domains and estimate a structural VAR. Property and procedure are affected for decades by their own shocks. Procedure and property coevolve. In contrast, contract adjusts quickly to its own
shocks and does not coevolve with the other two areas of law. We identify the episodes and events outside the legal system that correspond to systemic shocks. Edward Coke was a shock to
procedure. The commercial revolution raised attention to contract. The Glorious Revolution, interestingly, did not lead to elevated attention to property issues, but the Civil War and
Interregnum did. The evolution of contract, while relatively autonomous from the internal dynamics of the legal system, was, of the three legal domains, least autonomous from society.