The First Amendment to the U.S. Constitution remains the gold standard globally when it comes to protecting speech. But our guest says free speech protections cannot be guaranteed without strong support from those who it protects — including supporting others’ right to express ideas you might strongly disagree with. Jacob Mchangama has spent his career tracking free speech trends globally and understanding how it has ebbed and flowed over the course of recorded history. He is director of the Future of Free Speech think tank at Vanderbilt University, a Senior Fellow at The Foundation for Individual Rights and Expression in Philadelphia, and the author of “Free Speech: A History from Socrates to Social Media.”