In one corner of the culture we have a conversation about fascism, and in another a conversation about cybersecurity. There is an unnoticed but basic overlap: the internet affects the human mind in much the way that fascists hoped their own rhetoric would. Timothy Snyder is a historian at Yale University, specializing in eastern Europe, totalitarianism, and the Holocaust. His books have received widespread acclaim. His most recent book, "The Road to Unfreedom: Russia, Europe, America," tells the whole Russia story, from beginning to end, in a way that makes sense and reveals the big picture. He is also the author of "On Tyranny: Twenty Lessons from the Twentieth Century," which explores the everyday ways a citizen can resist the authoritarianism of today. His other works include "Black Earth: The Holocaust as History and Warning" and "Bloodlands: Europe Between Hitler and Stalin." Follow on Twitter: @TimothyDSnyder