Danish jurist and essayist Jacob Mchangama’s work, *Free Speech*, examines the 2,500-year history of liberty and the challenges it has consistently faced. The book investigates how the concept of free expression, originating in ancient Athenian democracy, has been under threat throughout history. Mchangama’s research details the various adversaries of free speech across millennia. He explores instances where those claiming to defend liberty have ironically become its greatest impediments. *Free Speech* offers a broad historical perspective on the ongoing struggle to protect open discourse. The work provides a nuanced account of the evolution and fragility of this fundamental right. It also analyzes the modern threats to free expression in the age of social media.