I’ve kept a copy of Timothy Snyder’s book “On Tyranny” on my desk since it was published, in 2017. It’s a small volume—the cover is about the size of an index card. Most of the time, it’s buried under stacks of paper from stories I’ve been working on. Snyder is a historian of the Holocaust and of fascism, at Yale, and this book, subtitled “Twenty Lessons from the Twentieth Century,” is a claxon rung to get our attention. “Listen up,” Snyder seems to be saying to Americans. “Tyranny, fascism, authoritarianism could happen here, too.” The juxtaposition of those two things—Snyder’s book, which was published shortly after Donald Trump took office, and my stack of papers, which focus mostly on aspects of American democracy—has not been lost on me. If it were simply a contest of words, and the contest were confined to my desk, democracy would be winning. But we know this is not the case. American democracy is imperilled, and not just because of Trump and Trumpism but because of an ingrained and widely shared belief that the Founders of this country insulated us from the excesses of government with the power of the ballot. We heard it the other day from Representative John Lewis, the civil-rights leader and icon. “To the rioters here in Atlanta and across the country,” Lewis said, “I see you, and I hear you. I know your pain, your rage, your sense of despair and hopelessness. Justice has, indeed, been denied for far too long. Rioting, looting, and burning is not the way. Organize. Demonstrate. Sit in. Stand up. Vote. Be constructive, not destructive.” These are vital words, earned words, wise words. But they also come from an abiding trust that, no matter what, the electoral system many of us were born into, and others, like Lewis, had to bleed for, will prevail.