Try to talk about the policies we need in a depressed world economy, and someone is sure to counter with the specter of Weimar Germany, supposedly an object lesson in the dangers of budget deficits and monetary expansion. But the history of Germany after World War I is almost always cited in a curiously selective way. We hear endlessly about the hyperinflation of 1923, when people carted around wheelbarrows full of cash, but we never hear about the much more relevant deflation of the early 1930s, as the government of Chancellor Brüning — having learned the wrong lessons — tried to defend Germany’s peg to gold with tight money and harsh austerity.

And what about what happened before the hyperinflation, when the victorious Allies tried to force Germany to pay huge reparations? That’s also a tale with a lot of modern relevance, because it has a direct bearing on the crisis now brewing over Greece.