Widening inequality is a blight on the modern economy and will ultimately undermine growth. But wait. Let's not hurry to fix it because history shows it can only really be addressed by total war, total revolution, state collapse or Black Death-like pandemics. That's the conclusion of Stanford professor Walter Scheidel, who joins Dan and Scott. Scheidel takes us on a tour-de-force of the rise and fall of inequality from cave societies through the bubonic plague to the two World Wars. He's not an optimist.