The battle over school textbooks spills out of Kansas and into California. At stake are whether gays are part of state history and how Islamic history should be taught.

We trust school textbooks to be packed with facts, to be dispassionate overviews of everything that is and that has ever happened. We assume that middle-school and high-school students today know the same stuff we knew at their age: that with certain embellishments, certain improvements and updates, each new generation chiseling its initials into desktops inherits a basic knowledge set, taken for granted, the nuts and bolts and navigators that we studied, back then.