Federal judges are not historians, but they are increasingly obligated to play them on the bench. In his Bruen decision last June, Justice Clarence Thomas ordered courts to assess the constitutionality of modern-day gun restrictions by searching for “historical analogues” from 1791, when the Second Amendment was ratified. Ever since, judges have struggled mightily with this task—in part because most have no training in real historical analysis, but also because the record is often spotty and contradictory. In light of Bruen’s maximalist language, they have erred on the side of gun owners, finding a constitutional right to buy a gun...
