Woodrow Wilson, a practicing academic historian before he took to politics, defined the importance of history: "A nation which does not know what it was yesterday, does not know what it is today." He, like many men of his generation, wanted to impose a version of America's founding identity: it was a land of the free and a home of the brave. But not the braves. Or the slaves. Or the disenfranchised women. So the history of Wilson's generation omitted...