Each primer gives the long view on one subject before you reach the local ledgers. Every figure in it names its source and carries a stamp.
For almost all of human history the family barely changed. Then, in about two hundred years, nearly everything did.
[C] 338 Cond. 246 [P] 97 Primer 02 · Who watches the watchersFour thousand years of charters, each tested the same way: could it be enforced, was it enforced when tested, and did later rulings narrow it?
[C] 66 Cond. 3 [P] 1 Primer 03 · Five-good affordabilityFive things a household buys, each priced in years of the typical household's income, in 1970 and now, with the quality and aid adjustments set beside them.
[C] 58 Cond. 8 [P] 0