No introductory work of American history has had more influence over the past forty years than Howard Zinn’s A People’s History of the United States, which since its publication in 1980 has sold more than three million copies. Zinn’s iconoclastic critique of American militarism, racism, and capitalism has drawn bitter criticism from the Right, most recently from President Donald Trump, who at his White House Conference on American History in 2020 denounced Zinn as a Left propagand...