Timothy Snyder is a historian with a modern message:

"You go after facts. That's what modern authoritarians do. Step One: You lie yourself, all the time. Step Two: You say it's your opponents and the journalists who lie. Step Three: Everyone looks around and says, "What is truth? There is no truth." And then resistance is impossible and the game is over. -- Timothy Snyder, Author of "On Tyranny: Twenty Lessons from the Twentieth Century"

http://amzn.to/2qPqmuH

"Believe in truth. To abandon facts...