The Great Derangement: A Terrifying True Story of War, Politics, and Religion at the Twilight of the American Empire is a 2008 non-fiction book by Matt Taibbi, published by Spiegel & Grau on May 6, 2008.

He covers his trips to Iraq, the United States Congress, a meeting of the 9/11 Truth movement and his time undercover as a born-again Christian in John Hagee's Cornerstone Church in Texas.

[4] Taibbi discusses 9/11 conspiracy theories as symptomatic of what he calls the "derangement" of American society; a disconnection from reality due to widespread "disgust with our political system".

While critical, Taibbi explains that 9/11 conspiracy theories are different from "Clinton-era black-helicopter paranoia", and constitute more than "a small, scattered group of nutcases ... they really were, just as they claim to be, almost everyone you meet.

"[5] In an interview with Slate, Taibbi explained the book's title: A theme I started to pick up on as I was covering politics for Rolling Stone was this idea that increasingly, we're not really a nation of citizens that have a commonly accepted group of facts that we're debating.