The world feels increasingly divided. Headlines scream of violence abroad and anti-immigration protests at home. Social media bombards us with reasons to fear those who don't look or sound like us. But are things really worse than they've ever been? Taking a deep dive into historical data reveals something surprising - despite today's challenges, we're living in a relatively peaceful era compared to centuries past. The 13th century saw up to 17% of the global population perish during the Mon...