Defunct The Force of Reason (La forza della ragione) is a 2004 book by Oriana Fallaci.

The book is a follow-up to The Rage and the Pride, aimed at her public critics, accusations of racism, and the lawsuits and death-threats launched against her.

[2] In the book, Fallaci states that Islam "presents a threat to the very existence of Western civilization, of conscience, of toleration, of liberalism–a message which is summed up in an epigram she quotes from the 18th century philosophe Diderot: “Islam is the enemy of Reason.”" She also compares herself to the enlightened Florentine scholar, Mastro Cecco, who in 1327 ran afoul of the local authorities and was then turned over to the Inquisition whereafter he was "tortured, and asked to recant his ideas, but because he cannot declare false what he believes to be true, he is condemned to be burnt alive in the public square, along with all his books and writings.

He writes that as in The Rage and the Pride, Fallaci has "one searing message to bring us, and she delivers it with breath-taking disregard for political correctness," and concludes that "ultimately, if reason has any force, it is due to the examples of men and women, like Mastro Cecco and Oriana Fallaci, who have given force to reason through their own uncompromising commitment to it.

"[3] In a more critical review, Ira Stoll, writing for The New York Sun, claims that Fallaci "strains the good will of even the most sympathetic reader."