Glenn is reading a fantastic history book right now called "The Miracle of Freedom: Seven Tipping Points That Saved the World" by Chris & Ted Stewart. The book masterfully weaves thousands of years of history to demonstrate just how rare freedom really is in the context of world history. Freedom didn't just magically sprout up in 1776 - there were several key events, or tipping points, that led up to that crucial moment. Do you know what they were? Glenn interviewed author Chris Stewart on radio today.