On Tyranny: Twenty Lessons from the Twentieth Century is a 2017 book by Timothy Snyder, a historian of 20th-century Europe. The book was published by Tim Duggan Books in hardcover and by Penguin Random House in paperback.[1] A graphic version, illustrated by Nora Krug, was released October 5, 2021.[2] The book topped the New York Times bestseller list for paperback nonfiction in 2017[3] and remained on bestseller lists as late as 2021.[4][5]
On Tyranny focuses on the concept of tyranny in the context of the modern United States politics, analyzing what Snyder calls "America's turn towards authoritarianism".[6] Explaining that "(h)istory does not repeat, but it does instruct,"[7] he analyzes recent European history to identify conditions that can enable established democracies to transform into dictatorships.[8][9] The short (126 pages) book is presented as a series of twenty instructions on how to combat the rise of tyranny, such as "Defend institutions", "Remember professional ethics", and "Believe in truth".[10]