For all the readers who grew up on the classic film “The Wizard of Oz,” this article might feel familiar. The Great and Powerful Oz, that giant floating green head that everyone looked up to? Yeah,...

Whether it’s the “blood libels” of early modern Europe, Germany in the 1930s, Charlottesville, Virginia in 2017, or even Occupy Wall Street, any person of good will should be able to detect the pattern:...