Timothy Snyder's New York Times bestseller On Tyranny uses the darkest moments in twentieth-century history, from Nazism to Communism, to teach twenty lessons on resisting modern-day right-wing authoritarianism. Among the twenty include a warning to be aware of how symbols used today could affect tomorrow, an urgent reminder to research everything for yourself and to the fullest extent, a point to use personalized and individualized speech rather than cliched phrases for the sake of mass appeal, and more.