One book and one author have changed how American history is taught. America is no longer the good guy but the cause of everyone’s problems. Who is the author? What is the book? And why has it become so popular?Mary Grabar, Resident Fellow at the Alexander Hamilton Institute and FrontPage Mag contributor, explains it all in this must-see video from Prager University. Check it out below: Howard Zinn and the Book That Poisoned a Generation