The Deadlier Sex is a 1920 American silent drama-comedy film directed by Robert Thornby which stars Blanche Sweet and features Boris Karloff, and was distributed by Pathé Exchange.

Mary Willard (Sweet), who has taken control of her father's interests after his death, has become so exasperated at the unscrupulous business practices of her competitor Harvey Judson (Hamilton) that she has him kidnapped to teach him a lesson and protect her shareholders against him.

At the station, after they are told that the government has seized their property, Mary and Harvey decide to join forces and work together in the future.

[2] Tagline: "A Drama of a Modern Girl in Whose Breast Flame the Spirits of Mona Lisa, Cleopatra and Sappho.

(print ad in the Bourbon News, ((Paris, Kentucky)) 6 December 1921) The Deadlier Sex was preserved by the Academy Film Archive in 2014.