The historian Fritz Stern fled the Nazis and helped pioneer the study of German history in the US. Before his death this year, he had been warning for some time of the signs of a resurgent fascism. He was not talking about the land of his birth. Fascism in the US? The fear is surely overblown. Before we write it off, though, we might ponder what we have learnt about fascism in general, thanks to the work of Stern and others.